Good price from what you describe. Here's some things to check:
Bulb under boney beast ramp. It tends to melt it in one spot. Not much fun to replace it, but it's better than getting a new ramp.
Slingshot plastics. They tend to break on the bottom corners.
Wear around the spider hole, skill shot and lock. Cliffy's take care of those.
Broken bones over the spider hole. If you're somewhat lucky, there will be a metal bracket installed to prevent the ball from breaking the bones when it's launched out.
Original flippers have bones on them. That's something I always look for.
Of course, wear on the crate decal. Very common. Little Shop of Games has an exact replacement.
Make sure the spider spins, stops and the correct bonus is awarded.
There's more, but that's all I can think of for now. Good luck and post photos!