My son has the dex210 rtr and I have race kit version. Only differences are the rtr has a 2 gear gear diff and the kit has a ball diff (personal I prefer the gear diff)
The rtr has the dimec +8mm chassis which the same length as the new v2 and is considered an hot up part! Although its the old type A style which is slightly weaker at the front, ours lasted 3 months before it had to be replaced with the type B (he's only 5 and its hit he wall at the end of the straight a few times!)
Comes with speed passion sensored speedo and 12.5 brushless motor. By far the best value RTR in my opinion around £155 at mb models.
I wouldn't look any further than this
http://www.rccarshop.co.uk/index.php...-red-5392.html
having been stung before with used cars, I would only buy new from now on. I bought a Durango 4wd and spent more than a new kit buy the time I replaced all the worn drive parts!