ORIGINAL: RAMTech-HBF-LSF
The Cat Dunerunner is a sub $600 LargeScale with very few problems and it will allow you to grow with your hobby. They are back in stock now at [link=http://www.RampageHopUps.com]Rampage Hop Ups[/link]
The HPI is a proven vehicle and a joy to drive and Hop-up.
I have the Dune Runner and it has been the least expensive buggy to run compared to the MCD and the Baja. It is a big beast though and you won't win any speed challenges but it is a tough nut to crack!