Doubtful you'll find anyone here willing to pay that kind of money...
I sold an unmodified TG-CD deck within the past year, complete with System 2.0 card, for $100 flat. That's about what an unmodified TG-CD deck is worth. Anyone paying $350 for a stock, unmodified TG-CD console is a complete tool.
FWIW, I'm not trying to deride your sale, just being realistic... If $350 is what you expect, I recommend you just dump it on eBay and set the reserve at $350. You never know-- I've seen crazier things on eBay. Recently some nutcase had a copy of Magical Chase up for $6,000.00. Barring that, you probably ought to just hold on to it.
It really does look like a nice system, and if there was anything in my collection I was gonna keep, that'd probably be the one.