Most resellers focus on platform fees and sourcing costs, then treat shipping as a fixed expense. It isn't. The carrier you choose, the label source (marketplace vs retail), and the packaging type can swing your shipping cost by 40% or more on the same item. This guide compares every shipping option available to US resellers in 2026, with a weight-by-weight breakdown so you can pick the cheapest option for each package you send.
Quick comparison: shipping options at a glance
| Shipping option | Carrier | Best for | Label source |
|---|---|---|---|
| USPS Ground Advantage | USPS | Packages under 1 lb (clothing, small electronics) | Marketplace labels or USPS retail |
| USPS Priority Mail | USPS | 1-10 lb packages needing 1-3 day delivery | Marketplace labels (discounted) or USPS retail |
| USPS Priority Mail Flat Rate | USPS | Heavy items that fit in flat-rate boxes | Marketplace or USPS (same price) |
| UPS Ground | UPS | 5+ lb packages, large items | eBay labels (negotiated rates) |
| eBay shipping labels | USPS + UPS + FedEx | All weights (20-40% below retail) | eBay shipping flow |
| Vinted shipping | USPS (via Vinted) | Light clothing parcels (buyer pays) | Vinted integrated labels |
| Depop shipping | USPS (via Depop) | Light parcels (seller or buyer pays) | Depop integrated labels |
| Mercari shipping | USPS | All weights (discounted labels) | Mercari integrated labels |
The key takeaway: marketplace-integrated labels are always cheaper than retail postage. eBay, Vinted, Depop, and Mercari all negotiate bulk discounts with USPS (and UPS, in eBay's case) that they pass through to sellers. Buying the same label at the post office costs 20-40% more. If you're not using your marketplace's integrated shipping, you're leaving money on every package.
Shipping costs eat margins quietly. Margeo tracks shipping cost per item alongside fees and sourcing — so you see your real net profit, not just your gross sale.
Track your real profit — freeUSPS Ground Advantage: the default for light packages
USPS Ground Advantage (formerly First Class Package) is the cheapest shipping option for packages under 1 lb, and it's the workhorse for most clothing and small-item resellers. It includes $100 of insurance, tracking, and 2-5 day delivery. In 2026, the rates for marketplace-integrated labels (eBay, Mercari, Depop) are:
| Weight | Marketplace label (discounted) | USPS retail (post office) | Savings |
|---|---|---|---|
| Under 8 oz | $3.19-$3.75 | $4.39-$5.09 | ~25% |
| 8-15 oz | $3.75-$4.50 | $5.09-$6.15 | ~27% |
| 1-2 lb | $5.00-$7.00 | $7.50-$9.80 | ~30% |
| 2-3 lb | $6.50-$8.50 | $9.50-$12.00 | ~30% |
Ground Advantage covers packages up to 15.999 oz at the lowest rate; 1-3 lb packages use the Ground Advantage cubic pricing tier. For anything under 1 lb, there is rarely a reason to use a more expensive service — Ground Advantage delivers in 2-5 days with full tracking and $100 insurance included.
USPS Priority Mail: when weight or speed matters
For packages over 1 lb that need faster delivery (1-3 days), USPS Priority Mail is the standard option. Marketplace discounted rates in 2026:
| Weight | Marketplace label (discounted) | USPS retail | Delivery time |
|---|---|---|---|
| 1-2 lb | $7.50-$9.50 | $9.80-$12.40 | 1-3 days |
| 3-5 lb | $9.00-$13.00 | $12.40-$17.00 | 1-3 days |
| 5-10 lb | $13.00-$19.00 | $17.00-$24.50 | 1-3 days |
| 10-15 lb | $19.00-$26.00 | $24.50-$34.00 | 1-3 days |
Priority Mail Flat Rate boxes (Small, Medium, Large) are priced at fixed rates regardless of weight: $8.55 (Small), $13.90 (Medium), $19.60 (Large) for marketplace labels in 2026. If your item is heavy (5+ lb) and fits in a flat-rate box, Flat Rate is almost always cheaper than weight-based Priority Mail. USPS provides flat-rate boxes for free — order them at usps.com.
Weight-based Priority Mail (marketplace label): ~$15.50-$17.00.
Medium Flat Rate box (marketplace label): $13.90.
Savings: $1.60-$3.10 per package. Over 50 packages, that's $80-$155.
UPS Ground via eBay labels: cheaper for heavier packages
eBay's shipping label program includes negotiated UPS Ground rates that are often cheaper than USPS Priority Mail for packages over 5 lb, especially for larger dimensions. UPS Ground delivers in 1-5 days depending on distance. eBay's UPS rates in 2026:
| Weight | eBay UPS Ground (negotiated) | UPS retail | USPS Priority Mail (marketplace) |
|---|---|---|---|
| 3-5 lb | $9.00-$12.00 | $15.00-$22.00 | $9.00-$13.00 |
| 5-10 lb | $11.00-$16.00 | $18.00-$28.00 | $13.00-$19.00 |
| 10-15 lb | $15.00-$21.00 | $25.00-$38.00 | $19.00-$26.00 |
| 15-20 lb | $19.00-$26.00 | $32.00-$48.00 | $26.00-$35.00 |
The pattern: UPS Ground via eBay becomes cheaper than USPS Priority Mail at around 5-7 lb, and the gap widens as weight increases. For a 15 lb package, eBay's UPS rate can be $5-$7 cheaper than USPS Priority Mail. If you sell heavier items (electronics, small appliances, bulk lots), eBay's UPS labels are the best domestic shipping option.
Vinted shipping: buyer-funded, zero seller cost
Vinted's shipping model is fundamentally different from eBay and Mercari: the buyer selects and pays for shipping at checkout, and Vinted generates a prepaid label for the seller. The seller pays nothing for shipping on standard sales. This makes Vinted the cheapest platform for sellers from a shipping perspective — your payout is the item price, minus zero shipping cost.
Vinted's buyer-paid shipping options in the US (2026):
- USPS Ground Advantage (under 1 lb): $3.69-$4.99, buyer-paid
- USPS Priority Mail (1-5 lb): $7.50-$13.00, buyer-paid
- Local pickup: Free, no label needed
The trade-off: because the buyer pays shipping, Vinted listings with high shipping costs may deter buyers. The platform's integrated rates are competitive (close to eBay's discounted Ground Advantage), but for heavier items, the buyer's shipping cost can exceed the item price — which suppresses sell-through. For light clothing and accessories under 2 lb, Vinted's shipping model is ideal: the seller's margin is unaffected, and the buyer's all-in cost stays reasonable.
Depop shipping: integrated USPS labels
Depop offers integrated USPS shipping labels at rates similar to eBay and Mercari. The seller or buyer can pay for shipping, depending on the listing setup. Depop's 2026 US rates:
- USPS Ground Advantage (under 1 lb): $3.95-$4.75 (seller-paid or buyer-paid)
- USPS Priority Mail (1-5 lb): $8.50-$14.00
Depop's rates are slightly higher than eBay's on Ground Advantage (by $0.20-$0.50) but within the same range. For most Depop sellers, the integrated label is the right choice — buying retail postage costs 25-30% more. Depop's payment processing fee (3.3% + $0.45) is calculated on the item price plus shipping if the seller pays, so factor that into your pricing.
Mercari shipping: simple USPS labels
Mercari offers USPS-integrated labels at discounted rates, similar to eBay's. The seller or buyer can pay depending on the listing. Mercari's 2026 rates:
- USPS Ground Advantage (under 1 lb): $4.00-$5.00
- USPS Priority Mail (1-5 lb): $8.00-$13.00
Mercari's rates are competitive with eBay for Ground Advantage but don't include UPS or FedEx options. For heavier items, eBay's UPS labels are cheaper. For light packages, Mercari and eBay are within $0.50 of each other — not enough to drive a platform choice.
Weight-by-weight: the cheapest option for each package
Here's the decision matrix. Prices are for marketplace-integrated labels (eBay, Vinted, Mercari, Depop), not retail postage.
| Weight range | Cheapest option | Approx. cost | When to use a different option |
|---|---|---|---|
| Under 1 lb | USPS Ground Advantage (any marketplace label) | $3.50-$4.75 | Vinted if buyer-funded shipping is preferred (seller pays $0) |
| 1-3 lb | USPS Ground Advantage (eBay label) | $5.00-$8.50 | Priority Mail Flat Rate Small ($8.55) if it fits and weight is near 3 lb |
| 3-5 lb | USPS Priority Mail or UPS Ground (eBay label) | $9.00-$13.00 | Priority Mail Flat Rate Medium ($13.90) if it fits |
| 5-10 lb | UPS Ground (eBay label) | $11.00-$16.00 | Priority Mail Flat Rate Medium/Large if it fits |
| 10-15 lb | UPS Ground (eBay label) | $15.00-$21.00 | Priority Mail Flat Rate Large ($19.60) if it fits |
| 15+ lb | UPS Ground (eBay label) | $19.00+ | Consider local pickup (Facebook Marketplace) to avoid shipping entirely |
5 ways to reduce shipping costs as a reseller
- Always use marketplace-integrated labels. Never buy retail postage at the post office. eBay, Vinted, Depop, and Mercari labels are 20-40% cheaper. The only exception is if you sell off-platform (direct to a repeat buyer) — then use Pirate Ship or Shippo for discounted Commercial Pricing rates.
- Use poly mailers instead of boxes for soft goods. Clothing, plush toys, and soft items ship cheaper in poly mailers because dimensional weight doesn't penalize flexible packaging. A folded t-shirt in a polymailer ships at actual weight (6-8 oz); the same shirt in a box might hit a higher dimensional weight tier.
- Use USPS Flat Rate boxes for heavy items. If a 6 lb item fits in a Medium Flat Rate box ($13.90), it's cheaper than weight-based Priority Mail ($15.50+). Order free flat-rate boxes at usps.com — USPS delivers them to your door at no cost.
- Switch to UPS Ground for 5+ lb packages on eBay. eBay's negotiated UPS rates beat USPS Priority Mail above 5 lb, and the gap widens with weight. If you sell electronics or small appliances, eBay + UPS Ground is your cheapest domestic option.
- Build shipping into your sale price. On platforms where the seller pays shipping (eBay, Mercari, Depop), list your item $5-$8 higher and offer "free shipping." Buyers prefer free shipping listings, and the shipping cost is absorbed into the gross sale — which means marketplace fees are calculated on a higher total, but the increase in sell-through rate usually offsets the slightly higher fee.
Want to see exactly how shipping affects your profit? Margeo's profit calculator factors in shipping cost, platform fees, and sourcing price per item — so you know your real net before you list.
Open the profit calculatorThe bottom line
For most resellers, USPS Ground Advantage via marketplace labels is the right default — it's the cheapest option for the light packages that make up the majority of reseller inventory. Switch to USPS Priority Mail Flat Rate for heavy items that fit in flat-rate boxes, and to UPS Ground via eBay for 5+ lb packages that don't. On Vinted, shipping is buyer-funded, so your margin is unaffected — but be aware that high buyer-paid shipping can suppress sales on heavier items. The single most impactful change most resellers can make is simple: stop buying retail postage and use marketplace labels instead. That alone saves 20-40% on every package.
FAQ
Sources: USPS price lists (2026), eBay shipping label documentation, Vinted shipping help, Depop shipping help, Mercari shipping documentation, UPS rate charts — consulted August 2026. Shipping rates change with carrier price adjustments (typically January and July); always verify the live label price before shipping.