Hi Shannon
We do sometimes sell the crepe myrtles locally, when the children do their plant sales. I'll often pot up 10 of them or so and sell them as mixed crepe myrtles. More frequently, though, if I have a visitor, I'll offer them to take some home and if they like the idea, I just dig up a few and put them in a box for them.
I guess I could send them through the mail but I'd want to do that when they are dormant for better success. Remind me next winter and I'll send you some if I still have some around.