On a recent build my favorite shop gave the new-to-me frame a full inspection and did a needed "chase and face" on the BB shell for $35.

I cannot tell you how much better a build goes together with this sort of treatment. I used to just work with what I got and then after a couple of builds with properly serviced Headtubes and Bottom Brackets and aligned Drop-Outs, etc. I am not going to skip this stuff again.

I am cheap, would rather DIY whenever I can, but ...

Really, it's worth it.