Ian regularly checks the local freecycle listings. We've obtained a number of items of furniture, gadgets and things for the garden this way. Recently we got an enormous number of seed packets from someone in a little village in East Devon. Most are annuals and all are out of date, but generally I've had no trouble with out of date seeds. Will give them a try in the Spring and see if I can grow some for sale (most of the packets are duplicated at least 3 or 4 times and I could fill the garden 5 times over if they all germinate).