Cheapest might be Texas, but best (and proboly most expensive) is NYC or Boston. All the best from everywhere ends up there because it's the most lucrative market. Outdoor from Cali and Hawaii, indoor from Vermont and Western Mass., hash from the sandbox, and the best of everything inbetween can be had if you know the right people and can afford it. For good cheap herb you can't beat Cali. I have been all over the country touring with bands and have had a chance to sample the best most places have to offer and there is good weed to be had almost every where, but the best follows the money and ends up in the Northeast or on the West Coast, no matter where it starts out.
And because I'm sandwiched in between the two (NYC and Boston), I get jack for ridiculously high prices. I hate the 860...