A reliable way to determine if particular record albums are collectible is to look them up on eBay.com or Popsike.com. Both sites provide reputable information to this end.
EBay provides insight as to what sellers believe to be fair prices for records. Use "record albums" as the search term to see all active auctions, or input a specific artist's name. Other search criteria are genre or grade.
Popsike.com is not a commerce site. Rather, it compiles auction results from EBay and other sites and presents this information in a user-friendly format. Popsike shows what pieces are actually selling for. To perform a search on Popsike.com, simply enter the artist's name.