That's the best policy, since used chassis will nearly always have something wrong with it, and there is the problem of a chassis being "tired."

A tired chassis means the plastic (or carbon) has lost it's "spring" like it had when it was new, so won't perform like a new chassis, though for many, that doesn't make much difference.

There are differences that can be seen and felt, and can add extra cost that can bust a budget, though. Then there is slop. Older chassis, especially those that weren't taken care of, will have developed slop in the usual areas (wheels, suspension arms, outdrives, and all pivot ballcups) that require part replacement.

It's best to start new, and get yourself a mid-level chassis. That will give you something you can grow with, rather than having to get something else that drives better, later on. The TA06 I considered a mid-level, and I can work up a small list of a few more, if you like. Get used to the idea that you will spend at least $250 for one, though. Some may be less, some a bit more, but that's about the going rate.