RE: HPI drifter
I paid £130 (UK).
I've run it now, I had a quick go the same day I posted on here, before we went camping for a day, but my battery wasn't peaked (I had to go, and just had a quick go before I had to leave).
I'm really really pleased with it. It takes a good squeeze of the throttle for it to really break loose, but then it drifts just fine, and the tyres look like they're going to last very well. I will be making up some ABS/PVC tyres though once I buy another set of wheels.
All in all though it's a sweet car, and I don't think I'll be hurrying to swap out the 20 turn motor that came with it, it seems plenty for drifting.
It is expensive compared to say a TT-01 off of Ebay though. I'll have to see what I think of the tyres after I run it a few more times.