I am browsing Craigslist at the moment just to see what is available. There is a guy offering a Ms. Pac-man with a monitor that only shows a blue line when it is turned on. He wants $500 which I know is way too high. What do you guys think a fair price is for this? I was thinking somewhere around $100 for the cabinet and game board.
Condition and your plans are key in defining a fair price,
For an upright, if the art is in like new condition, and the monitor has no burn and is the only issue, 500 is a steal, blue line sounds like vertical collapse which is nothing a cap kit won't fix, but if the monitor is burned to hell and if the cab is beat to hell 500 is a rip off. If you are going to mame or multi it you could recoup some costs by selling off the fully working board? harness, ps, etc.
So it really depends on all of the variables.