How much does an iPod touch 2G screen repair cost?

My ipod touch 2G is now cracked due to me dropping it (not badly but just cracked) in the kitchen floor by accident. still works with no problems with the buttoms. i was thinking of taking my ipod touch to the apple store but i dont want a replacement. i only had the ipod for 2 months. im upgrading to ipod 4/iphone 4 soon but i still want my ipod 2 to be in handy. any thoughts? thanks.