I got a Wonka coming for the route. Whysnow is correct, if you keep your game clean and well maintained, there is no problem when resale time comes. In the past few months I sold a GB pro and SW Pro. Both were from my route. GB brought me 4650 and sw 4800. Cant complain on 2 games I owned for 2 and 3 years.
Another example of resale is a few months ago a woz that was so used it had wear spots on the playfield still brought 5800. I cant imagine how much it made to get to that point.