I'm going through my own journey with this at the moment, the thing I keep telling myself is that "this item will have a better life somewhere else" and "my house isn't a landfill". It's tough though.
Plus selling stuff is a full-time job really and it's annoying AF if it's not your day job. So I guess the question is - are you going to ever sell it? If not, then it doesn't really matter if it's expensive, it's just taking up space.