Taken from Various Posters on RGP:

1 New rubber
2 New balls
3 All bulbs must work, although when I sell a machine to someone, I
replace every bulb.
4 Playfield cleaned, plastics cleaned, repaired, replaced.
5 All coils tested, all modes of game tested.
6 legs polished,new non scratch feet/casters installed, cabinet cleaned
and waxed.
7 All “toys” checked and tested.
8. All assemblies taken apart and cleaned and the area on the playfield
around said assemblies cleaned.
9. New coil sleeves.
10. Flippers rebuilt.
11. GI header pins/connectors rebuilt as necessary.
12. Ramps removed, cleaned and polished.
13. Translite removed and cleaned.

Thanks to David Anderson & Mike Schudel