At £2500 for a Volkswagen Cabriolet, I'm guessing it may be a Golf. If that's the case, insure it through a classic car policy. When you insure a vehicle, they will ask you what you use it for, this is usually social use, or with the extension of to and from a place of work. At your age, make sure the to and from a place of work is not on there unless you are still working. This massively affects premiums. Try googling classic car insurance and contact them directly. Don't use price comparison sites. I would expect the insurance on a Golf Cabriolet to be around £150 - £200 on classic car insurance. Also, I'm guessing you don't do many miles, and more so with two cars, so agree a limited mileage. You can always increase it part way through the policy should you wish to do some touring.