I think the wasteland style badges I did for RMFC turned out pretty well. Although I don't know about any other apocalypse themed cons coming up, I'm going to keep doing a few more badges in that style.

I'm going to open four slots at a time so that I don't get backlogged, thus these should have a pretty quick turn around.
Price: $30 includes lamination, lanyard and shipping. Final size is somewhere around 5x7 inches usually.

Examples: http://www.furaffinity.net/view/8611903/
http://www.furaffinity.net/view/8606609/
http://www.furaffinity.net/view/8605004/
http://www.furaffinity.net/view/8598765/
http://www.furaffinity.net/view/8599193/

So far I've been choosing the costumes randomly, but I'm willing to do specific looks or color schemes on request.