My gamestop has a used copy of ICO for 20 bucks. Should I buy it?

[makingmusic476]

I managed to get Ico brand new off of Ebay for ~$50 back in July. It was actually $85 "Buy It Now", but I had a coupon for 35% off any "Buy It Now" auction. And the $85 was abnormally low for the game. Most go over $100. I just managed to find a good deal that had literally JUST gone up.