Most resellers think they know their margins. They don't.

Here's the math nobody does: You buy a pair of Jordans for $120. Sell on eBay for $200. Nice, $80 profit right?

Not even close.

• eBay final value fee: ~13% = $26

• PayPal/payment processing: ~3% = $6

• Shipping + packaging: ~$15

• Gas to the post office: $3-5

• Your time listing, photographing, packing: ???

Your real profit: $48-50. That's a 25% margin, not the 40% you thought.

Now multiply that blind spot across 50-100 listings per month on 3-4 platforms with different fee structures, and you've got a serious problem.

This is exactly why I built MarginFlow — it calculates your true profit across eBay, Mercari, Poshmark, FB Marketplace, and StockX automatically. No more spreadsheet guessing.

Stop leaving money on the table because you don't know where it's going.