I have no problem whatever with AEMSA. Apparently I don't buy from anyone who participates in AEMSA, but I have no problem with their existence -- but I reserve the right to buy from whomever I choose, because I'm terribly afraid our stupid gov't is going to take that right away from me, for no good reason except that THEY THINK THEY CAN.
It may be that this will end up being put to rest in the courts, but it may be too late for some small businesses by the time it's finally decided. So I intend to enjoy my favorites while I can; stockpile a little (how long does pre-made ejuice last, a year?), and work on my DIY skills so that maybe eventually I can replicate some of the flavors I like best.
Andria
To answer your question... There are people now using nic that is 4 years old. After testing, the only downside was a slight degradation of the strength of the nic over time. Just make sure to follow proper storage procedures, i.e. preferrably amber bottles, stored in a dark space like a freezer, as little exposure to air as possible, etc...