I have an agreed value policy with Grundy on my two, 57 Olds and 34 Plymouth for amounts between $20K and $30K each and my cost is just over $300/year.

Initially I had Hagerty which was a great policy with side perks, but they were a little pricey (approx. twice the price). Can't say anything negative about them and they were quick to settle claims.

Was also with Midwest Classic Ins for a short period, they had good rates but at the time they also had mileage restrictions. Something I could live with then, but I knew that one day I would have to change.