[Crowdsourcing] RPG Book Buying Guide?

Do any of my more knowledgeable friends know if there is something equivalent to the Comic Book Buyer's Guide for old RPG books? As I have been working my way through the old boxes in the family basement, I have unearthed the majority of my old gaming stuff. While I would like to start up some RPGing again in the future, the vast majority of what is here I will never use. Most of it is probably worth the couple of bucks I would get for it at my FLGS, but some of it may be worth more. Is there a central source I could use as a quick check to at least make a first-pass effort and which are worth a second look? Anyone know?

Anagram Map of the Montreal Metro

What it says on the tin.

I am happy to be most accessible via Normal Toy or Rye Daub.

Little Boots!

Hey, they found Caligula's tomb!

Beautiful Horror

Pictures of industrial waste.

Who will sit on the Iron Throne?

I have to admit, I am liking the Game of Thrones preivews.