I've been looking for something to ride for a while. I know of 3 Honda's, one for $5000, one for $4800, and one for $4000 (higher mileage though), so yeah, thats not too far off.
Des the DT 175 require premixing the oil & gas or does it have separate locations to fill? You dont really see many 2 cycles down here since everyone is either on a Honda, Yamaha (4 Stroke) or a Meilun usually.