Buying my first bong please help :)

So I've been smoking for a few years now, and I've always wanted my own bong. I want a relatively small one that one or two people can hit off of. We have a shop that sells pipes and hookah's and they don't ask for your age or anything because that's where i've bought a lot of my pipes. However, they never have any bongs. So I was wondering how I'd go about either ordering one on the Internet or buying one from a store? I'd like the shop to be as less sketchy as possible.

Most big cities have more than one head shop so ask around and find out where they all are, i would not recommend getting a glass one right away as they can be expensive and broken easily and btw don't call it a bong if you are buying from a shop, call it a water pipe.
I don't know if they are age restricted where you are but in the Scotland you have to be 18 to buy any paraphernalia by law. I had to get a homeless guy get me mine, im only 15