yeah, i was a bit young back then brimck, but i've heard that meth was bigger up till the 80's or so like you said when coke prices took a nose dive. back in the 70s from all i know and have heard, coke was pretty much a rich person's drug only, and you'd not see it around outside of certain circles.. idk what and why coke prices went way down, probably when the government started to bring the drug in, and also when crack took off in the early to mid 80's or so..
i used to be able to get crystal at raves back in the 90s, and have gotten some crank a few times, but not really into it..