Compare marketplace fit, calculate the real payout, and check verified fee changes before you list. Start with your item and get to a decision without opening a spreadsheet.
Direct answer: FlipCalc is a free marketplace fee calculator for sellers comparing eBay, Etsy, Poshmark, Mercari, Depop, Facebook, StockX, Whatnot, Amazon, and Grailed. It ranks modeled payout on the same inputs, then links to platform-specific calculators for shipping, item cost, promotions, and category fee checks.
13.6% + $0.30-$0.40 per order
6.5% + 3% + $0.25 processing
Flat $2.95 under $15; 20% at $15+
10% seller fee, processing included
3.3% + $0.45 processing, no US commission
10% shipped checkout, $0.80 minimum
7%-9% seller fee + 3% processing
8% + 2.9% + $0.30 processing
8%-17% referral + FBA/FBM costs
9% + 3.49% + $0.49 processing
You do not need to understand every FlipCalc tool. Pick the question closest to your listing and we will take you to the useful part.
Start with the item, then compare marketplace fit, fee pressure, shipping, and likely payout.
Choose a marketplace 02Enter one real listing and rank platforms after seller fees, shipping cost, and item cost.
Calculate my payout 03Check dated, sourced policy changes and see what they mean for a typical sale.
See verified changesShort answers first, with the calculation, source trail, and exceptions available when you need them.
The direct answer: do not assume Pirate Ship is always cheaper than eBay Labels or that eBay is always cheaper because it is inside the order flow. Pirate Ship says it has no markup, no monthly fees, and USPS Connect eCommerce pricing below Commercial Pricing on some USPS services; eBay says eBay Labels provide negotiated rates and can save compared with post office or carrier retail rates for most services.
The direct answer: USPS 2026 rate changes matter to resellers in three layers. January raised USPS Ground Advantage prices about 7.8%, the temporary transportation-related increase adds 8% to domestic competitive package base postage from April 26, 2026 through January 17, 2027, and the July 12 update changes commercial Ground Advantage ounce pricing, dimensional-weight handling, and hazmat compliance details.
The direct answer: eBay Promoted Listings General now needs to be modeled as an attribution-cost problem, not just a visibility toggle. eBay says a General attributed sale can be reported when any buyer purchases the same promoted item that any buyer clicked in the most recent 30 days, as long as the item was promoted at click and sale.
One email per change — no spam, no marketing. Just "here's what moved and by how much."