Minimally when I hear game is been routed I assume it needs a shop job, playfield cleaning, yada yada, plus I would suspect some bulbs out and maybe a switch or 2 need repaired/replaced, possibly a couple chipped plastics? and maybe flipper Button wear.
Those are my first assumptions.
I assume when someone is selling a HUO game that I really need to check stuff out, get history, verify , fact check, ask questions , paperwork? You get the point!
A HUO only game should need nothing done , unless it's been specified as such.