Tough to say. Probably not many of these out there so not much selling data. Same time not a highly desireable title so you are looking at a limited market. How many people want to spend 100 hours and drop $$$ to put a playfield in a game that in nice shape doesn't break 3k?
Also, whoever buys it is then going to send it off to kruzman or the like to be touched up (handling wear) and get it clear coated. My guess is 600-700. Could always start higher than that and work your way down over time.