It really depends on the power level too... you can buy a BW-S475 turbo for less then $600 brand new, or chinese MP stuff even cheaper if you dare.

Yes, you'd still need to build the hot side, and get a wastegate, but you can't even come close to touching that price with a procharged system at that HP level.

I'll have less then $2500 into my entire turbo build for my '62 (Turbo, wastegate, blow off valve, hot side piping, cold side piping, flanges, bands, clamps, hat, carb conversion, etc...)

But I'm doing it all myself too... if you had to pay someone to fab the piping, it certainly wouldn't be that cheap...