How and where can ~I find out how much eBay charge for return shipping labels?
If it's cheaper I'll send an Evri label myself.

The return is a clear cut case of "not as described" abuse, but I will resolve the if the seller actually decides to return their half eaten food item that that have decided they don't like!
How much are these postage prices negotiated by eBay?
Parcel2go / Evri charge £2.24 + VAT