03-01-2020 3:25 PM
You sold an item for £420, so your 10% final value fee will be £42. It isn't rocket science!
If you didn't bother to check eBay's fees before listing it, whose fault is that?
You can see all of eBay's fees here: http://sellercentre.ebay.co.uk/private/what-fees-youll-pay