Also, I'm not sure if I ever made this point with any force...
There is an upper limit to how much people will pay for puerh tea, especially younger tea. It's roughly about $350/400g. Beyond that limit, only the rich will buy that tea, and it's pretty easy to saturate rich people's demand for high quality tea. Thus, after a year or so, the expensive tea that's left gets neglected until a new crop of rich people (and a new marketing effort) come onto the scene, wanting fancy tea. So most older truly good tea (absent very famous teas like the '99 Yiwus with good storage) becomes illiquid. Nobody sells the tea unless you make a pretty good offer, UNLESS, they are hard up for money. Then you see really good stuff for what seems to be absurdly low prices for what they are.
So if you like expensive young tea and want to buy some, but don't want to pay totally huge money, you watch and wait for people who are hard up at the moment. Then hit the tea hard.
Old tea? You're on your own. Watch out for the fakes.