Bid analysis assumes a flat 12.9% eBay final-value fee. This is the rate for trading cards as of 2026 for standard sellers in the US. If you're a Top Rated Seller with discounts, your actual fee may be ~10-11%.
Shipping is handled separately — the bid analysis pulls the listing's shipping cost when eBay surfaces it, or estimates $4 for "calculated at checkout" listings. International shipping adds ~$25 if applicable.
There's no per-item fee, no listing fee (since we're buyers in this context). If you're using P&L tracker to log sales, the same 12.9% is applied by default but you can override per-sale.