Whoa! Crazy coincidence. I was in there this afternoon and noted the same thing! I talked to staff who mentioned that they were prototypes and testers (some for the military purportedly) . I saw a porter, a bunch of Windrinders (2010 and 2011 versions) and a few xpac prototypes (red and blue ones).
Various sizes, some were missing the stays, some had the older plastic stays, some had the older skinnier waistbelts, I noted one with the new 2011/2012 wraparound hipbelt. You gotta be familiar with the different years and features to really know what you're getting
Pricing was 100-150. Awesome deal and very tempting. Struggled for like 30 mins before walking away, only to think about it for another hr or 3 in the car ride back to Boston :D
It was nice to handle the hybrid cuben material though...that stuff is really really tough.
If you're in the North Conway area, check out Wild Things as well (minutes away from IME)