i've bought over twenty c&v mid-level bikes so far, and none was i forced to part-out due to frame damage.
stuck stems? check.
stuck seatposts? check.
stuck crank bolts? check.
stuck cartridge bearing hub cones? check.
spoke nipples that don't turn? check.
derailleur anchor bolts that were stripped? check.
bars that were crooked? check.
bent shifters? check.
bent rims? check.
i'm batting 1000 so far on correcting these issues and building some fantastic bicycles. you just have to pull the trigger and figure it all out.
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oh ... i would check for stuck stems and seatposts pre-purchase, though.