How much is a slightly used UVEX FP 2 helmet worth?

Hi,
I have a slightly used Uvex Fp 2 helmet that will be up for sale next week and I just wanted to see how much it could be worth. It will have been used 5 times. I did sand the inside very slightly as it was a tad tight on my noggin. Let me know and if you are interested in it I could sell it and hold it til next week. Thanks for your help.

Here is the info:
http://www.trizilla.com/triathlon/pc/viewPrd.asp?idcategory=1461&idproduct=12126