Hmmmm.
The best buggy for the money is either the mugen mbx6 or the associated rc8buggy (IMO). Both are around 4-5oo dollars and a good engine to get started is the novarossi n21bf limited. Don't let the 160 dollar price fool you. It's a good engine. It tunes easy and runs the whole main long. I have cut my best lap times with that engine. Servos are expensive for a buggy but the Ace 1313 is perfect for steering and you can use it in the throttle too. the 9053 pipe from Novarossi is great but expensive so the knock off OFNA version is good too. this should put you right on as far as price. The losi and D8 cars cost too much in repairs and relacing parts. In the long run they will be more expensive.