Seems to me like you got away with some pretty good deals for both. What I would do with the old e-maxx is to put some new electronics in there if you have the money! Meaning probably a brushless motor and an ESC (Electric Speed Control) that would be able to take the beating. Most motors and ESC's come as a combo. I just recently bought a new motor and ESC for my Buggy and it costed me $300, this is not a cheap hobby by any means, but it is worth every penny since I have a passion for this hobby. Its a great time to meet up with friends at a track or bashing on some random jumps made out some random pieces of wood that you have laying around!