I don't know exactly where you live but my suggestion would be to get the hell off eBay if you want to pay fair prices. Way too much game-playing going on, especially for anything semi-desirable and certain genres like jazz. If you don't have access to local record stores, find shops that sell their used stock online on their own websites. They are out there. Start with a small/lower value order to a get a feel for grading and packing. If you can drive to another area with more local shops, do that. IME areas with a lot of shops can often have wildly varying prices for what is essentially the same album. Areas with too many hipsters and vinyl nerds will often have higher prices generally.