For what its worth I just bought a Joe Namath 1/1 patch and I was checking on eBay to see what his 1/1 stuff sells for before I made an offer and I saw that this sold for 15 bucks and your work is much better. Dont waste your skills selling them for 10 bucks.
2011 Joe Namath New York Jets 1/1 Sketch Card By:Q | eBay
I'm with the other saying the 1/1 should be on the back. Just do something like this, make a separate card on your printer, stick it behind the card and put it in a 1-screw with some kind of sticker on the top so its tamper proof. I bet you would get the most money out of them that way.