I will be giving a list to my friend who sells classic arcade games to all those who would like a Tron Machine. He has worked on mine and knows the machine well.
The price of the machines vary depending on many factors. But he is fair and will give a 1 month warrenty on the machine.
the more people that buy Tron machines the cheaper he will sell them.
Please include what condition you are looking for. Mint, good shape working, good shape not-working, working, fixer upper, etc
Just for those not in the know a mint or near mint Tron will be easily over a $1000 so I wouldnt recommend it unless you are loaded

I would go for the middle ground. something that works but has some cosmetic flaws. you could get those as low as $400.
One of the reasons I would like to see you guys/gals have these machines is because I know you will treat them with the respect they deserve.