6 forks at Granny's

I found a set of 6 of these forks, please help me to evaluate them.
Thanks
forks.jpg

The hallmark is London 1790 and the maker appears to be Richard Crossley. Value depends on size, pattern and condition. I suggest you check eBay’s completed auctions feature to get an idea of what people are paying for forks similar to your Granny’s and also what people are not prepared to pay. A search on “georgian fork” in the solid silver category gives several results.