Eyeballing it: - $300 for the steel frame (retail cromo disc-compatible frames are in the 400-500 range) - $200 for cheap disc wheels - $100 for the disc bra

Eyeballing it: - $300 for the steel frame (retail cromo disc-compatible frames are in the 400-500 range) - $200 for cheap disc wheels - $100 for the disc brakes - $200 for the remaining components (levers, crank, seatpost, saddle, etc) So yes, $800 seems perfect. I couldn't hope to build a bike that cheap at retail cost.