Opening online shop??

I am playing w/ the idea of opening an online shop to sell bongs, pipes, and etc etc. Since it will be a 1 man operation (me), I'd like to keep the number of products low, with the highest profit margin. Maybe 10- 20 items or so.

But I know nothing about this industry nor do I smoke anything so I was wondering...what are some popular items that many people buy? What are some "MUSTS" to put on my site.... bongs? herb grinders?

All I need is to figure out what to sell, 10-20 things and I can do the rest. I have the hookups for marketing, and can drive traffic to my site easily.

I have sources to buy bongs, crack pipes so far.....

Water bongs, Pipes, Hookas, Papers, Single hitters, Pen pipes, grinders, and like...stuff related to weed but not acually used to smoked.. Weed posters..key chains,..shit like that