Only 0.50? That's pretty cheap. FedEx Kinkos is overpriced. I might consider doing this for a majority of my SNES games.Well the cases cost generally around $80ish for 100 at a time ($59 + shipping).
Then covers only cost $0.50 to print each one.
So really not much. (other then the initial $80)
I've printed over 100 so far. Granted was over course of several months. It may ended up costing me $50 for the prints, but that was really nothing as it was spread out.