Not sure if this is a daft question but I have not been to the Harrogate show before and I was wondering whether there is an area where individuals can buy and sell (and donate) their own parts and tooling etc?
I recently went to a vintage radio rally and they have a small stall where people can deposit stuff, put a price on it, and if it sells the society take a percentage. The donate bit is if you want the stand to sell your stuff and keep the money for the club or organisations benefit.
The only rule in force at the radio rally was that unsold kit had to be taken away rather than being left as a problem for the organisers!
Ian P