I just stumbled across this great website called Green Plant Swap (www.greenplantswap.co.uk) where anyone can sign up for free and either buy, sell or swap plants you have grown with other like minded growers in your area and I think it's a great idea.
You can recycle the plants that would otherwise end up on the bonfire or the compost each year and it's also a simple way for you to share the seedlings and young plants that multiply more abundantly than you have room for - instead of chucking them, SWAP them or even sell them! to your neighbours.
Sadly, having registered there seems to be a slight lack in members near me so I thought I would try to spread the word and get people on here as the more people that join, the more advantageous it will be for everyone!
P.S I don't work for these guys, I just genuinely think it's a great idea!