I will not buy something like that.
If he tested the body why would he sell it as-is? Also, if the lens need servicing, are you going to get it done? That'll cost you quite a bit... Also, don't assume there is back, or finder included if he doesn't tell you so. Even if the kit is fair price for the condition, doing ANYTHING to it and having it professionally done will put you in a price range where you could have bought a much better kit with guarantee of function.
I don't deal with Ebays... I only buy from known APUGer or other places that offer known good guarantees.