not really i get arcade stuff for nothing alot (as im sure u do too), most "normal" arcade owners just want the 300lb block of wood outta their house lol.
Anyways i'm not the one who made an offer, but in all honesty with the crap economy, and the area we live in, arcades are a tough sale bro.
Nevertheless if i had a ton of extra cash and more desire for this game i would snag it up at $300 just because it looks like you put a lot of work into it and it should be a solid game for a few years for sure. But i still couldn't say i wouldn't start a negotiation at a $200 range if i was in the market. I mean i'm a member of Klov and all of us are cheapskates for sure
Good luck!