Since no one has mentioned it, I'll just recommend the LOSI XXX-S sedan. It's sealed drive train really helps on dusty parking lots, etc. I've seen other belt driven cars have problems with a rock or other debris getting caught in a belt pulley, etc.-- never happens to my XXX-S. I know there are newer offerings from LOSI available, but my XXX-S is still competitive running a GTB/13.5 combo at the local HobbyTown parking lot races...
These cars are easy to find on eBay, etc. and LOSI is still making the RTR, RTR Brushless, and the new Drift-R RTR -- all three are based on the XXX-S, so parts availability is not an issue...
"If you cannot win, make the one ahead of you break the record."
Biff Racing Team #420 (Ah... The "good old days"...)
The local indoor Offroad Track: The RC Race Barn
TLR22-3.0, TLR22T-2.0, TLR22SCT-1.0