Trying to build up my Alpine as cheap as possible as a bike for a mate. Got forks and brakes, need nearing everything else!! I've added my mates budget for each part......
SRAM rear mech - £10 ish
Cranks (with rings and bb) 73mm bb, 170 or 175mm crank length - £30 ish
50mm - 70mm stem and riser bars - £15-20 for both
Lock on grips - £5
27.2mm Seatpost - <£10
Saddle (charge spoon type shape) - <£10
Flat pedals - <£10
These need to be as cheap as possible really, condition not that important as long as they function.