Quoted from Crash:ColorDMD is worth $250, not $400. I can buy a SmartDMD kit and get colorized games/colorize my own.
I wasn't aware that you could colorize your own Williams/Bally titles. How does that work? Are you talking about just setting a palette? Not really the same thing at all.
Anyways, personally speaking even if you could, my time is worth a lot more than $150 considering properly coloring a game takes 80+ hours.