Same as OFG and many others - I strip, clean, and reassemble, replacing anything I deem unservicable. If I wouldn't ride it, I won't sell it to someone. It's gotta be clean, safe, and fully functional.

So, at minimum my bikes usually get new tires/tubes, tape, and cables. And, I disassemble, clean and repack headsets, bb's, and wheel bearings if needed.

Any bike that passes through my hands will be as clean as possible and completely ready to ride before I move it on.