I think it's a great idea Carl, though perhaps the trade members on here might lose a bit of business. If it gets more people tying, and more people trying better quality materials they will gain in the long run.
I've only been tying a few months and already there are things I have a surplus of, or will never use.
How about bagging things up in £1, £5, or £10 bags to make it easier to balance the swaps? You could have "lucky bags" of mixed materials too. I quite like the idea of having small samples of lots of different materials.
Every member would need to post an updated list of what they have on offer and what they'd like in return.
Let's get the prototype up and running before Christmas. Carl, you can be Noel Edmunds.
SharkeyP