Jaysus, if you have to ream, chase and face a frame when you buy it, something is definitely wrong.

Pugswitters, if you can make a cabinet, you can put a bike together. If the LBS presses the headset in and puts the BB in and builds the wheels, all you need is a few allen/hex keys and a chain breaker. Really, it's not that hard - It's even easier than programming a VCR!