Well I am making the big move to a stick and I going to sell my 350. Any idea what they go for?

I got $250 for mine & it had a hi-stall converter with it.

Used 150.00

I couldn't give mine away for free... Still have it all gutted. Going to make a coffee table out of it one of these days. Wife already told me "no way in #ell that's ever making into to the living room..."

100-150 bucks for a tranny is good working order.
if it has problems your best bet is to sell it for scrap