It's about 2-3 Zipin for a real GFZ.
The flip side is that the Zipin is only just nice tea, in my book. Plenty of older Yiwu out there that's not worth the piss, so the Zipin stands out a bit. Glories of glories 10yo Yiwu with some real qi tend to be unavailable (but found at better prices if you keep an eye out to snipe), while famous teas are extremely expensive even if it's not a fake.
I don't think there is much of a way out. Even when the bubble pops, the single mountain puerh world is going to be like the super-famous green teas...the average consumer will have to go way out of their way to taste something truly good, and have it all go above their heads in terms of comprehension, like pearls before swine. The sheer amount of tea Yunnan produces, even of the good stuff, can help, but everyone and their mom is going to monopolize each little village to support high prices. Hopefully, better care of the trees come into the bargain, as there have been some note in the Chinese nets about damage to the ancient plantations, particularly in Bingdao and Xigui.