I posted a few weeks ago that I was going to build my little brother a bike to start racing. He just turned 18, so for his birthday we got him a lot of stuff. The rest he reimbursed me for.
I bought the frame, FD, RD, and seatpost from ebay, the shifters, wheels, crank, BB and cassette came used from my team members for a deep discount. I got a few things like headset, tape and cables from Supergo. The rest of the stuff, bars, saddle, fork, I had and gave him for close to nothing.
It's a Fetish SAC frame with Airborne Aileron carbon fork. 105 derailleurs, Ultegra crank, BB and shifters. The wheels are Rolf Vector Comps.
Total for the bike as you see it is $598.70
He ended up paying 350.00 out of his own pocket.
It went really well for my first build, and I got to get my brother into something that I think he will enjoy.