I found it for 250!
I've had someone on Atari Age recommend Keith Courage as well, so I'll have to hit him up if the repair isn't done to my high expectations (aka: working, haha).
I can't describe to you that feeling of finding it... man. Like I've said before, I've had odd ball systems: X'Eye, Sharp Twin, Hitachi GPS Sega Saturn, N64 DD, heck even a consolized CPS2. NEVER have I ever seen a Turbo Duo in the wild. Period.
It was like the longest 3 seconds, haha. You think it's a Duo, you realize the power button is the wrong color, you see the logo, you see the controller, you freak out, you realize you can't afford this so don't get excited, you see the price... you get excited. Seriously, I was practically blocking the entire display case with my body until the clerk came over to let me see the system, haha. I didn't want anyone to scoop it up.
And yeah, Devil's Crush is one of my favorite games for the system, up there with Bomberman and Galaga 88/90. Speaking of which, two games I need to buy...
Can't say how many times I've played the game, yet only when I played this Turbo Duo did I figure out the unlimited coin glitch (hence the high score and giant vat of coins displayed). Not sure if that's been found or not (I'm sure it has been...), but it's a nice memory now to associate with the system. It'll be the one TG-16/PCEngine I had that memory with.
Thanks for the warm welcome. Glad I didn't post this in the wrong section. Looked around for ages for an intro section, and didn't find one.