Popsike.com has lists of vinyl sold, price, country, site, condition, etc. You get a certain small amount of free checks before you have to create an account and use your login.
Three more sites would be Wegotrecords.com (free) Valueyourmusic.com (free) & Rarerecordpriceguide.com (subscription required)
Ebay also list prices after an auction has finished....but being honest so much depends on
condition, pressing, label, format etc and despite an album being listed at such and such price ultimately it's about demand and supply and what somebody is prepared to pay. I recently used a few sources to value my collection and it worked out between £60 - £80K but I'm in no doubt that if I ever came to sell I'd be lucky to get 25K unless I sold each item separately via sites such as Discogs, Ebay, CD&LP,com, Amazon etc .. which could take forever.
That being said it still gives me a thrill that the Blitkrieg Bop single I bought for 50p forty years ago is now selling for £350+