Im in NY and around here there is nothing like that. Either they are strains (most common ones are Sour D, Northern Lights, and White Widow) Or they are the following listed from worst to best:

Shit=Shit 15$ a twomp
Mids=Mids 20$ a twomp
Headies=Between mids and dank usually 30$ a twomp
Hydro Headies= Same as headies but from a hydro grow 30$ a twomp
Dank= Good shit we do not use that term often around here lol I wish we did 35-40$ a twomp

Dank is usually where the strain names come in like I know about an hr. south of here I could get some Purple Kush, OG Kush, Fire Kush, White Widow, Sour Diesel, NYC Diesel, I have heard some rumors of Purple Haze, and much much more. usually its not worth buying though because of such steep prices.