I've got it at that price because of brand new tyres roughly £1k, Kahn alloys can't remember exact price but in 5 figures! (not to everyone's taste) and larini/tubi exhaust set up
If you have the original wheels I would probably put back on and sell them separately. Khan wheels have always divided opinion especially on here and I may be wrong but most buyers of these cars like the car looking standard apart from the exhaust upgrade which seems to be the upgrade most want even though Maserati have always made great sounding cars. Good luck with the sale.