1990 Upper Deck: Giveaway/Contest Ideas

I just snagged off of eBay a box of 1990 Upper Deck for $7.18 (and that includes shipping and handling). I don't care what you say, a box of cards for 7 bucks is awesome! But, the fact is, I don't want all 540 cards from this box (that's just too many). So, I want to either giveaway the cards I don't want, or have a group break of some sort. But, the question, how am I gonna giveaway these cards? So, I pose the question to you, my readers. How the heck should I giveaway/get rid of the cards I won't want? Please comment with suggestions!