Originally Posted by
Garvin
Peter the true value of these guns depends on their condition, the exact models involved, their originality, completeness and so on, which can't be judged from the serial numbers alone.
For insurance purposes I would consider getting the Beeman Blue Book of Airguns (or signing up for an online subscription) and using its pricing information. It's not very accurate and can be very patchy but it would probably be good enough for what you need and would carry weight with the insurance company in the event of a claim.