There is no shortage of top shelf in California. There is a huge shortage in Colorado, however. You've got mid-grade weed flying off the shelves for top dollar in Colorado. It's hilarious.
There is definitely a shortage of affordable top shelf here in Cali, and no shortage of mids at rock bottom prices.
I wonder though, if a skilled grower moved to CO, where would he move his top shelf to? If the public doesn't care, and retailers can get mids at rock bottom prices and move it for top shelf prices, where is the motivation to buy from an illegal grower growing top shelf? Stepping into that market sounds like it would be hard to get a foothold.