That sounds around where people are pricing low mile cars...Hard to judge them these days as not many come up for sale but there have been a few go up at 20k lately with miles under 20k........Rare car and one that will hold its price.........15/16 is where they start for good ones and I pretty sure this will not go much lower....
ADG gave up retailing 3200's years ago (too high risk of something going wrong in the first few months when the dealer is liable) so for them to have this AC it must be a pretty exceptional example.................
Looks great considering it's pre-prep. Bit of a break in servicing from 2008-2011 (though only 3k miles done!) and will be due a cambelt service. Won't be many with sub 16k miles!