How can you have a private sale on ebay?.
If you mean your buyer paid in cash then you still pay the fees which is charged to your account as soon as the item sells
£3.36 does not seem right for a £20 sale
Ebay fees on managed payments 12.8% + 30p which is about £2.56
You can check your fees on the seller hub under Payments to see exactly what the charges are for
