Well, I'm going to tell you this. The higher quality vendors are almost always found on the net. A brick and mortar store will have overhead and most likely will not specialize in
vaping supplies. I've tried a few and their prices are outrageous.
If you absolutely MUST find one, then you can try and visit one of your local tobacco shops or "head" shops. These places will normally sell all manner of "tobacco pipes" and so on but my have a small selection of e-cig or
vaping options. The people working there will have very little knowledge unless you are fortunate enough to find a store that really does specialize in vaping stuff. There just aren't very many around yet.
The other alternative is to just go ahead and get a disposable from the gas station. These are not great pieces of equipment but will let you try an e-cig without much cost.
If you do decided to take the plunge and buy from one of the reputable vendors on here, I'd suggest starting out with a kr808 kit. These can be had from vapor 4 life, smokeless image and a few others for a very reasonable start up cost. They are by far the simplest way to get into it. You can then decide if it's something for you and if you'd like to graduate to something a bit bigger, etc.
Good luck.