Depends if the game is a common game or not, then I would go to completed auctions and find the average selling price and list a BIN. If it's a rare game I would rather try to go for the gold. Start it low on a Sunday night around 9pm and just let it go, the collectors know what they want and some might be trying to finish a collection. Sometimes you may get a bidding war especially with sniper software now and this can be huge $$ for you. Hope this helps. :)