That price is top market value for the game. You might be able to talk the seller down, especially with the side art not there. I think $200 is a fair price if it's 100% working and cosmetically decent.
The number of plays doesn't mean much in a 30 year old game unless it's a very small number possibly indicating that it was Home Use Only. It's probably been on free play for 30 years so the number of plays cannot be determined. What you would want to look for is if the monitor was capped, the main board capped and the ARI board capped, and maybe the big blue replaced, because if they haven't and you use this game for any length of time, the game is probably going to break down in fairly short order. You should also check to see if the black light is still working, if not, you will have to buy one of those, adding to your cost (no, it's not expensive but everything adds up in time and money). Speaking of that, make sure the Asteroids background is still inside the cabinet. It's hard to see if the black light isn't working or if the background is dirty.
I have one of these, I paid $100 and spent $50 in parts and a few hours to get it working. It's a cool game, one of the most interesting designs of the era and arguably more challenging than the original Asteroids. Plus, there is a multigame coming out that allows you to play both asteroids games and lunar lander in one cabinet.