You should be fine... A 7Y (size 7 youth 6-10 years old) is supposed to be 9.75", which is the same length as a 7.5 mens. You can confirm this if you want at zappos . com under their Size Conversion Chart. Oh, and $50 sounds about right based on their condition.
I found some Jordan XI Breds at a shop the other day. When I looked at the tag inside, it's marked 2005. I know there was a small 200 pair run in 2005, but I didn't think there were any Breds made. Can someone help me out on this? I already have them and am wondering if they're real or not...