My current 2009 4/4 Sport includes Green card, unlimited annual mileage and spouse driving at £236.
When I last insured a 1994 +8 four years ago under the same conditions as the sport it was £260.
I am also 50 going on 60.
Try giving Headley a call on 01420 5942342 they are Morgan Insurance Consultants and play with agreed values etc.
Good Luck