Please have a look at this collection of books for sale, which came from the house of Judith Nelson, who sadly died earlier this year. Her family are very keen that they find new homes, and they are therefore priced at ridiculously low prices. All monies raised go to the Conchological Society. There is very little overlap with books on Bas Payne's current list.
Books can be collected at a NHM meeting or from Reading, Berkshire. If mailed, then postage at cost.
Otherwise contact tom@tmwalker.co.uk for any you'd like to own.