I've used Nobleknight a lot for store credit. Was easier to simply sell them stuff than to deal with anyone else - I sold board games, lot of Zombicide stuff, etc. They often buy lesser valued stuff, as long as you have something good to package with it. Nobody wants Bob the Zombie, but Bob the Zombie PLUS Bobby the Zombie, and you're in business....
eBay, once I linked banks, had no issue. I just notice things don't sell as well, or as often, or even for realistic prices. Their 'categories' have also gone kind of nuts. I used to buy a lot of O Scale terrain, but finding it now is a pain in the ass.