Well if it's any consolation, games retain their value much more than TV's and they don't break as much, at least electrically.   I just sold my blood bowl set on ebay.  amazing to me that after 10 years I sold the game for as much as I bought it for.   I could have tried to sell it as a collectible and tried to get a lot more but then i would feel guilty for selling used crap.   then again...

Edit:  How can Space Hulk 3rd edition be worth $200 dollars?