Just a few things to consider when selling online. First, are you ready and able to safely ship trees? Some people just don’t want to deal with it. The Facebook groups are very active, and when items are priced well, they sell. I bought a Chinese quince through one of them earlier this year and had a great experience.
If you don’t want to ship, then it seems like there are very active clubs in your area. I’d imagine you could sell them locally with a lot less hassle. Having said that, it seems like people from different areas of the country are willing to pay a little more for material than others. Local supply and demand seem to play into it heavily (I’ve seen higher prices in the mid-west and east coast than the west coast).
Good luck selling things. And as always, people want to see pics :).