While this 2006 Topps blue parallel set is numbered to 10, it really should be numbered to one as Topps sent out only one of these ten sets.
I don't collect many modern cards at all, but I picked up this card years ago in the auction mentioned in the link below...even to this day I have yet to see any copies from this set not numbered 7/10, so I guess none of the other sets were snuck out of Topps' back door. I wonder what Topps did with the other 9 sets?
Here is what the recipient of the 7/10 set tells about the set in a listing.
https://www.worthpoint.com/worthoped...0-145-only-one