I sell cheaper things (<£200) on eBay for whatever I get in the auction, even if I only make enough to cover the postage.
More expensive things I try to find friends and family willing to give me something for them. eBay scammers for macs and iPads are a nightmare as it’s easy for them to win an auction and then disappear when they see you’re not gonna get screwed over. Then you have to start all over again.
I see it more as reuse than selling. The money I make from selling covers the effort of selling it and is a reward for keeping the junk from piling up.