Yea I usually will buy used unless I find a deal
things I bought used
MY 2 MT1's made one into a MT2, and the other into an electric (currently redesigning it from scratch).
My Savage X

Bought new
Tamiya DF-02 (hell a used one cost almost the same price )
Jammin X1x couldn't beat $320 shipped with a motor and all, where used rollers were going for $200+
Losi MHR it was cheap

Other:
My 1/10th buggy with hand made chassis, and a pile of new and used parts so no idea how to classify it

Think I might build a RS4 on-road car out of my spare MT1 parts for fun after I get done with my next 2 projects seeing I'll only need 2 diffs, shock towers, and maybe shocks. I already have arms from an original belt driven RS4, and a couple other parts.
next project after my MT1 electric redesign I'm buying an electric airplane kit I figured out a decent starter rig for around $160 and kind of want to dabble with the sky RC's