I very much doubt that other than a small minority, people know their engine number. It's just generally a factor for nearly everyone
C
Engine number is on the v5. There is no excuse for not knowing it.
If a seller can't be bothered it's their loss. The only thing I will say, that very sadly it seems that maserati granturismos are a buyers market, so sellers need to be on point if they wish to sell in a timely manner.
I think one day that will flip, GTs are guaranteed future classics...but we're some time before it becomes a sellers market.
I paid 32k for a 2011 GT 4.7S mc sportnline with all the carbon trim and fantastic condition about 18 months ago. I fully expected it to depreciate which I'm sure it has, but as I don't ever plan to sell it's irrelevant.
Good luck with the sale, base your price on good research in all places they are advertised and watch what they are being sold for on auction sites.
Advertise everywhere you can. Watch out for scam sellers.
I always figure you need 3 months to find a buyer. Some cars I have sold in 3 hours, some in 3 days, some in 3 months. My favourite was doing a deal for 71 911 on Christmas day. I probably had that for sale for 3 months.
So give it some time and don't drop your price straight away. Don't be afraid to put it on an ebay auction, but I would not list anywhere you have no control of a reserve price.
Finally I don't believe in cars sitting on the market, if a car had not sold in 3 months
...its overpriced