BJ, I don't have any involvement in running the Primitive Archer PITH trades, but in my own opinion, the thing that makes it the most fun is for all levels to participate. A beginner may be trading with one of the best, or two of the best may be trading with each other. It's all about seeing each other's work and appreciating the struggles and accomplishments of others. After participating in a lot of PITHS, you can look at the variety of what you have received, and there will be beginner work, master knapper work, pretty material, crude material, big points and small points. Some may be pressure flaked, some percussion, some made with copper and some made with stone, wood and bone. For me, looking at the PITH points I have received is a lot like reviewing my journey in this addiction.
The other thing that makes it really special is for everybody to post photos of what they receive so everybody else can enjoy them too.
WA