That 4400 offer is plenty fair. Game looks like it needs a lot of work (total shop out) and I hate Mylar on a diamondplate playfield. Removing that will be a pain the buyer will need to deal with.
I do agree with the eBay comments. After fees you are probably coming out equal or ahead with the slightly slower cash deal - and by the time you are done with the typical eBay experience (deadbeat bidders, fees, bad feedback for no reason) you'll wish you'd just gone with cash n carry.
And as you said those are asking prices, not selling prices, so it's irrelevant anyway.