With mine, if they own the bike, I do it for about $600. I have a few old bikes and $100 Avalons if they want to start at $750.
If I buy the Sun Alum 7 bike, with modifications (wheel/tubes/accesories) they go for about $925, plus they do a little of the labor (takes about an hour).
Special equipment was a bike stand $125
Small electric air compressor Northern Hydralics $75
Table Vise $ 3 at a yard sale
2 wheeled grinder $ 60
Various small tools and bits $200
Tires/tubes/12 guage wheel inventory $100