well the cond is the real question? if its worn out, dont work, needs the playfeild repainted back glass has issues ect it very well could be a couple hundred $ game. however if the cond is good i would go more than that. your local market might be a little softer down there, and it depends on the people involved. they might just want it gone, 200 might be a good price for both of you.
i dont look to get everything for " a steal" so to speak- ive picked up a couple pins where i gave them a little extra just because it was actually a little nicer than stated and the restoration was going to be a little easier on me.
also ive seen the other end too- they claim it works great and it wont even start, bad touch up's ect, they were gonna have to drop to make the sale.
its kinda of a karma thing i guess.
anyway its an awsome game, sonic games have very nice art, also the cabinate is screened out not stenciled, and its smooth and cleared coated too.