i have wanted a birkin for the longest time, but got too caught up in my chanel pieces. anyways, i walked into SF hermes about 3 months ago and asked about a waitlist. they said they didn't have a one. i figured since i was there, i would get a wallet to match my birkin if i ever got my hands on one. long story short, i have bought tons of wallets, about 7 or so, keychains, bangles, and card holders in the past 3 months. now i also own 2 birkins.
so yes, you have to be an established customer but most importantly, IMO, you have to have a good relationship with your SA. she called me for my first birkin about 1.5 months ago. and about 3 weeks ago she called again with another birkin for me. hopefully she'll call me soon again.
definitely worth the money!!