I think that the token is a nice solution for the problem. Back in the days, blizzard tryed to ban gold sellers, but it was a lost cause. Instead, the token seems to have resolved the problem, letting workers that want to raid with consumables and stuffs to have the golds to do it. Personally, I don't find the gold buying really fair, but I understand that for many people is a necessity and I prefer to leave the economy and the farming spots to the player instead to the gold sellers.
I wanted to talk more about Classic here and my experience with it, especially relating to my Vanilla days, but somehow I kept writing about this rift that's forming in the WoW community. I can't seem to shake it, and for all the many, MANY times WoW was diagnosed as "dying" (and never did/never will), this one actually worries me. Some people have worried that Classic servers will split the community because BfA and Classic can't play together and few people will have the time to play both, but I'm worried it will REALLY split the community on a more philosophical level. At the moment WoW is back to being the most watched game on Twitch, beating out Fortnite and the rest, so shouldn't this be a happy moment for all of us that care about the game? Regardless of whether you enjoy BfA, or are holding on for the next expansion to fix things, or can't wait for Classic, can we at least TRY to keep things civil? We can disagree all day long, and I'm the first to put my opinions out there, but just don't accuse people of being... whatever it is you think they are. Argue facts, discuss calmly (or well, at least try to), and if you see the other person isn't doing the same, just politely stop talking to them. It's that simple.
Where to get materials and reagents you may ask? Buy for cheap off farmers in bulk or track Auction House lots. Get in touch with most big sellers. Communication is important here, send a whisper or write them a letter. It would be good for both of you to establish business relationships. Constant suppliers and buyers is convenient for both parties to save the time and effort.