Sellers ship a bit of everything
One week it is sneakers, the next a boxed monitor or a brake rotor. Because listings swing across categories, a tool that reprices each parcel beats any flat shipping habit you might have settled into.
Type what you sold, add two ZIP codes, and see what USPS, UPS and FedEx actually want for the label. Every dollar figure on this page came out of our production quote engine on 2026-07-27 and was pasted in unchanged.
The rows below are a live pull from the SMKlog engine, dated 2026-07-27, for the exact box described next to them.
We asked the calculator to price a typical eBay sale with no further detail. Lacking specifics, the estimator settled on a cautious mid-size carton, about 18 × 14 × 10 in at roughly 17.6 lb packed, and pulled five live services for the Newark, NJ 07102 to Atlanta, GA 30303 lane. Since the box is an estimate, confirm your real packed size before buying.
| Carrier | Service | Price | Quoted transit |
|---|---|---|---|
| UPS | Ground Saver | $21.77 lowest | 4 business days |
| FedEx | Ground Economy | $21.78 | 4-5 business days |
| USPS | Ground Advantage | $23.69 | 6-7 business days |
| UPS | Ground | $25.12 | 3-4 business days |
| FedEx | Ground | $32.23 | 3-4 business days |
UPS Ground Saver took the low spot at $21.77, a single cent under FedEx Ground Economy at $21.78. Margins that thin flip all the time, which is the whole argument for quoting fresh instead of trusting a static page, this one included. The figure shown is the full checkout amount, SMKlogās charge already inside.
One week it is sneakers, the next a boxed monitor or a brake rotor. Because listings swing across categories, a tool that reprices each parcel beats any flat shipping habit you might have settled into.
Marketplace label flows are built around the common cases. A parcel that is unusually long, heavier than a typical clothing sale, or leaving from an address other than your usual one is the moment an outside quote earns its comparison.
You write a plain sentence about the item, the estimator proposes a packed box, and you adjust anything it got wrong. Checkout runs as a guest and the label prints at home.
Run the item through the calculator with your ZIP and a guess at the buyer region. On 2026-07-27 a mid-size 17.6 lb parcel from Newark to Atlanta came back at $21.77 with UPS Ground Saver, and that figure already includes what SMKlog charges.
UPS Ground Saver at $21.77, with FedEx Ground Economy one cent behind at $21.78 on the same 2026-07-27 quote. The ranking moves with box, weight and lane, so treat any list as a snapshot.
No. Quote the parcel, pick a live rate, pay and print as a guest. A tracking number rides along on every label.
Any sturdy carton is fine. Cover old barcodes, tape the seams well, and enter the true packed size and weight so the price you pay matches what the carrier scans.