To scoleman123,

I really dissagree with your low percentages :) And something I should have mentioned, all of my pieces are limited, signed and authenticated limited to 10-20 on large works, and 50 on medium works. Single commissions is really your call, with friends and family getting the best break :)
You have to consider yourself as an artist, and the worth that you offer. It was only just over a year ago I broke that "magic barrier" of $1000 for a single piece, with a young couple purchasing two canvas works (one was 43" x 84"  and the other 36" x 47" both framed by a reknowned gallery)
The hard costs alone were just over $1200, take away a 50% commission with a $ 3000 sale and I ended up with a whopping  $300 for about 50 hours of work. The thing that artists forget is their time creating a piece, let alone preparing, color correction etc in the final image prep. A decent target for profit is $0.35 to $0.45 per square inch. ( I should mention that both were not straight photos, but highly manipulated abstacts using multiple photos, hence the time factor) Both are in my gallery here at R'R, "Forest Floor" and "Metamorph". When doing shows as well, I always have lower priced clear bagged bin stock matted images that are far more affordable. This has saved my butt many times lol!

And to the foam core thangy, heat, humidity and the type of adhesive used are all factors. Since I deal with all of those factors during transporting a show, gave up on the stuff entirely except for corporate demos. And yes, gator board, though more expensive saved me money by not having to reprint and remount warped art.

All the best!

Kurt