Its a bit complex for me. But it seems that you can only sell your product in certain ways, that apparently are ways no one really want to do.
What you are asking for is trees at a price you feel good about, but the ways they can be sold means no profit because the sites you can sell on take a large %.
Walli is the best at making it all work. But I don't know if he is making new trees. I believe he uses x frog. X frog may be the only big tree soft that lets users sell their trees the way they want. Or Walli may have a professional relationship with xfrog. I don't know.
But I totally agree with you that there are not too many options, and even fewer cheap ones. Again walli is the best at making things possible for all, but I really don't know if he is still making new trees. He does (or did) sell them on NWDA though.