In the latter case, they're not worth buying. I can make a slightly bendier maple as well as anyone.

So the question is, why should it be that only e-on can make a new source tree, given that without a source you can't make a new species and are limited to fir, plum, cherry, maple and palm trees. Oh, and winter pear and acacia. And an anonymous dead tree. Given the huge variety in nature, being stuck with these few shapes is absurd.