That would be for "new with warranty", used. even not much you're gonna have to deduct some otherwise there's no point for someone to get that instead of buying new. And as mentioned if the accessories are not interesting to the buyer they won't...
People typically won't bother making an offer if it has to be a whole $2000 lower for the price to be reasonable because they'll be pretty convinced they have no chance of it being accepted.
Checks for new firmware for any of the known devices.
In that situation you typically don't want to update anything or even let it access the internet to check since it'll do it in the background on its own.
Common issue with enterprise models is the typical customer for these won't buy used, it'll be a company purchase that requires new gear with after sales support.