The Style of the Walter White glasses (Not Heisenberg sunglasses)is Stetson 250. Walmart has this in their eye Rx department. Their stock number is 4155824708.
The Heisenberg sunglass's are Smith Optical Turnable. They no longer make this style. However some stores, (supermart racks at the check-out counter is where I got mine) sell a Polarized generic "Fishing Sunglasses" for about $20. Cheapy plastic frames but the style is a dead ringer for the Heisenberg prop.
Well, it seems that you are attracted by his unique acting in his films. So,to be honest, the type of the glasses he wears is called square shaped glasses. Generally speaking, that kind of glasses frame is not very special, you could absolutely find them in almost every eyewear store in America. And a pair of them would not cost you too much money.
Yes, the eyeglasses the Walter White worn is so cool that attract a lot of girls' eyes. If you want to buy the similar type, I suggest you to go to the online store to have a look. The price there may be suitable. You could go to the https://www.cheapglasses123.com/metal-glasses-1-2a to have a look.