Some teas started having QS marks on them in 2006, not a lot though, but not unheard of. By 2007 it was pretty much on everything.
The first cake, as BBB mentioned, is selling for 18 RMB on Taobao. Sure, if you like it, buy a ton of it, but I doubt it's very good tea.
The second cake is not found on Taobao, but I doubt it'll cost very much since the other products of the factory are very cheap. From the looks of the leaves in your pic, it looks like some very run of the mill tea. No reason to buy more of it, IMHO.