Vaporescence has a location in Ft. Worth and their prices are very competitive to online since they are both B&M and online. If you don't mind driving the distance, their location in Richardson is the best one to visit. The team there is very helpful and will answer any and all questions you have. They are very knowledgeable in the field. Don't let their age fool you. These kids know their stuff, and they care about the customers needs as well as a genuine concern for your health. You can buy 30ml bottles of juice for $18.35. That includes tax. Carts are $2.50 and if you use clearomizers $6.50 or $6.95. I don't remember for sure on that one.
I've never been to the one in Ft. Worth, but I hear they are not so customer oriented.
I did go to the Denton store once, and was treated very well there. All in all, it's a good company as a whole.