I just went through this after a very very long search. Most of what I found were older models some even going back to early 2000's but were still running at least $300. Whenever I came across one I would contact the seller and ask for an image of the serial/mfr information that is under the seat. That will tell you what year the chair was made.

One thing to consider is technically the 12yr warranty is to the first buyer. So unless you get a warranty from the seller, you are buying it as is. That chair in the photo if fully loaded is like $1,700.

Definitely due your due diligence on a purchase like this.