Well, if that $300
is the dealer's cost, then I'd still be happy

.
Machine winding will most definitely take costs down. Look at brushed motors for example, hand wound ones cost about $70+ while their machine wound counterparts are about $40. If that logic were to stay true with this situation, it would take the price down from $280 to $160.
SH Z-Car, Custom Crawler, 8s Savage,
12s XTM XLB 1/7 buggy,
4wd 4-link rear/IFS Pro4 truck,
Custom Hyper 10 Short Course,
Belt-Drive Mammoth ST 1/8 truggy, 4s 17.5 MM Pro HPI Blitz