I had searched for over a year for a G3R carbon after selling my aluminum version. Last november I scored one in almost new shape all stock but had a nice airtronics servo, Mamba Max speedo with a Hacker C50 motor, and TONS of parts with 5 complete sets of wheels. I got it for $500 shipped.
I've had it for that long and have yet to reassemble after stripping it down. Too many projects in the way but just ordered a complete Slayer Pro conversion to make it the rarest 4x4 SC on Earth.
I may sell it after because I'm terrified of breaking anything on it since spares are impossible to get and am also curious what they go for but NOBODY is selling them. I have noticed the carbon ones fetching a lot more than aluminum and they come up for sale a lot less often which is probably why.