I own a Family a Guy and it's got great humor, not the best playing machine I've owned but I enjoy it better than potc - I just couldn't get into potc at all which I played on route and have no desire to own.
Value wise FG was always worth about $500 more but potc has creeped up a bit and is getting closer in value.
Seeing you have 8 games so it won't be your only machine and were interested in the trade enough to ask - if the FG condition is as nice as it should be if it is a HUO - I think adding the $350 is fair and a 2 hour round trip is certainly not a big drive.
My vote is go for it unless the condition is overstated on FG or if you are really attached to potc.
ScottinSGFNY