Well, fair play to the seller. He/she is obviously feeding a demand in the marketplace.
I had a quick look at some of the items, and there seems to be some decent stock, but hard for me to say if it is value for money, since I have no benchmark for Nursery prices in the U.S.
Having said that with 252 feedbacks in 12 months, at lets say an average of $100 per tree - thats a tidy income of over $25,000. I just saw one sold at over $ 200, so maybe $ 35,000 + is not an unreasonable guess of turnover !
Even better if it is a "part-time" business.
Regards,
Ian.