When I put a record up for sale the fees are factored into the price, as are the postage costs.
I'd much prefer to advertise a record for sale at a set price without any additional costs so that the buyer knows exactly what they are paying upfront.
I sold a UK copy on eBay a couble of years ago for £125 buy-it-now.
The reason I sold it being that I picked up a US copy for £10, which was around $15 at the time.