Any advice on selling a collection gratefully recieved!

[jo]

Hello. I am hoping that someone out there can give me some advice on selling a shell collection. I have tried to find ways of doing so, but really dont know what to do for the best, so I have come to the experts! I have a large collection of coweries and cones, which my late father built up during the 70's + early 80's. It is something he took enormous pleasure in, and as a frugal man, he would want me to get a good price for them, now that it is time to pass them on. I am in Devon, in the UK. I think there are over 400 shells. There are two old cabinets both with 20 partitioned drawers, pretty much full of shells. The local auction houses dont seem to deal with this sort of thing.
Any advice would be most gratefully recieved. Thank you.