I live in Los Angeles, and have the benefit of a Chinatown.
Unfortunately, I don't have great knowledge yet about what an authentic
aged puerh looks like.

Wing Hop Fung, a ginseng, tea, and other chinese product retailer, has
several puerhs for sale, mostly cooked and low quality. They do have
two cakes they claim to be aged. One is selling for $23.99, and the
claim is that it's about 20 years old. The other cake is placed as
being made in the 1950s and sells for $199.99, but it looks nearly
identical to the one they say is 20 years old. They're both green
"Zhongcha" label teas, with wrappers in pretty good condition. I bought
the "20 year" cake out of curiosity, and the leaves are varying shades
of brown (not black), from a dark tan to dark brown and many shades in
between. It's got a good taste, but it's very strong and tastes like a
refined version of other cooked puerh cakes I've had. Unfortunately,
the tea master there didn't know enough English to tell me anything
more about the cakes, and I don't speak any Chinese enough to get
anymore info.

I read that it's nearly impossible to tell how old something is by
looking at it, so I don't know if it merits posting a photo online.

I was just curious if anyone else on here lives in LA and has seen this
store and this cake. Maybe I'll get some samples of aged cakes to
compare the flavor to and report back...