people must be lying... mine is sirjorge.com/skateboards and i just sold a skateboard over night...this month's sales are really bad. Last month I had 8 board sales and 3 dvd sales, this month...it's nearly non existent.
There is money to be made.... Niche target your customers....for example I had an aStore with all conservative politcal books and i put a link in my sig on conservative forums....
Astores can rank very well in a short time, but from my experience you'll make more with your own sites. The astores aren't bad, quick and easy solution, but even with a good ranking I don't see too many orders via them.
It depend on what is your "good money". 1000$ or 10000$. for me happy with 1000$/month tough i still make only 100$/month from astore.