I guess you're paying for playfield plastics and furniture, some coils and a cabinet...What are the decals like?
How bad are the boards?
I'm not sure how much the playfields Marks getting in are - but I guess you are looking at 50+ hours to rebuild and cost of new PF and boards if required
If it was me - allowing say decals ($400), boards ($400 - probably not required), display ($280), playfield ($1200 ? guess) misc ($400)
$1200 would be a fair price I guess.....if the plastics, ramps etc are all OK...