Can anyone teach me how to market fast and effectively?

I've heard of many players making large amounts of TC in a short time just from marketing.
Like I heard that Flamezzzzz made over 300k just from marketing in a very short amount of time (He said he buys a bunch of cheap items and sells them for more than they actually are, but I don't see people being stupid enough to buy an item that's like 1000x the original price).