If you are buying homebrew stuff in UK I have an idea for a hop exchange.
I'm buying Hops in 5Kg minimum quantities from Charles Faram (Charles Faram Web) but I want a range of hops and I wont use 5kg quick enough. I have to freeze them. The cost is about 17 pounds a kilo whereas buying it in 100g pouches from homebrew shops (68 pounds a kilo). If others bought other hops we could exchange and save a lot of money and have a greater variety of hops? Let me know if you are interested.
I think if you use a kilo a year it make sense. You can freeze them and we could end up with every hops we want for a quarter of the price????