i have worked for one of the big net based distributors of alternative products and had conversations over the phone with one of the biggest in europe about them ripping our products.
unless you really plan to dominate and provide everything that kind of individual might want there's a good chance you'll end up only making a few bucks and having to mess around - look at how many sites there already are
a lot of the sites are not what they appear to be, they're being run as networks by a couple of people pretending to be a bunch of different sites. they can then recommend people towards their main site with amazing reviews and chat. prices (sales) and products are not always what they seem to be.
it is very hard to deal with people ripping you off. not only are they small stores on the net, the kind of people behind them are not usually the kind of people who are going to play fair, they'll have fake addresses, use different names and deny any knowledge of what's going on.
you can do it but think hard about things like, what are you going to provide that isn't already out there. why will someone choose your store over the already big commercial adventures. and try not to let yourself be blinded, you need to really have how you'll reach people locked down
