Vintage Video game price list

Does anyone know of a site that has values for vintage video games? Like a Kelly Blue Book for vintage games? I just bought a game (Tyrian) from back in 1995 with the packaging still on it. I don't want to sell it per se, but I just want to know how much its worth.

Thanks!
-Firesnowball

I use these two http://www.rarityguide.com/vgcons_view.php http://videogames.pricecharting.com/

I use ebay when guesstimating prices. Is that a PC game or a console game?

Most people don't collect PC games I don't think. Console games are very desirable CIB (complete in box) and even moreso in the cellophane still. If its a console game, good find.