I once bought a
Double Play Baseball machine for $100. When I picked it up I discovered that it was in a converted Robotron cabinet. I would say the side art (which is painted on, using stencils) was an 8 or so out of 10.
I got this game as part of a five-game package with no intention of keeping it. The minute I began trying to sell it, people came out of woodwork to tell me, "DOOD, you should TOTALLY convert that back into a ROBOTRON!" And all I would have needed would have been a new control panel, and joysticks and buttons, and a Robotron PCB, and a marquee. ICJ can help me out here, but I'm thinking we're talking about $300-$400, somewhere around there.
And, here's a secret. I barely like Robotron, and I'm terrible at it. I'm not sure I've ever seen past level 4.
So then what I started telling people is, "hey, YOU should buy it and convert it into a Robotron!" And people were like, "nah, YOU should do it." And this went on and on and I found a lot of people that wanted ME to convert it to a Robotron, but nobody else who wanted to.
So eventually I sold it and people called me a fool and a dummy for not converting it to a Robotron.
I think I said this in Invading Spaces, but arcade collecting is the only hobby I know of where regardless of what you do, there are 100 people waiting around to tell you that you did it wrong.
But to answer your question, if you had a working Bosconian and converted it to a MAME cabinet, yes, people would come out of the internet woodwork to call you a cocksucker.