I honestly liked the one to one swap idea better and what sis mentioned I also like as we send directly to our person of trade. Having folks do more than so many on such a timely piece takes a lot of time and energy and towards the end pieces start to fail. I'm only speaking for myself as I know this in my style. Smaller projects are easier to do a large trade.
Still a good idea about size and price but I won't be participating if it isn't one to one.
I hope that it goes to the original idea because I'd like this idea.