I'm so stupid

.
I was so happy to win the CD single for Self-Obsessed and Sexxee on
Ebay.
According to
Chris this one was never released regularly so I was willing to pay more than 20$ for it.
Only today when I wanted to place it on the shelf I realized that I already own a copy.

I really should stop collecting this things If I can remember what I own. Did something like that happened to you too?
Btw, If you want to trade it for something you don't want PM me.