My Snowpulse Guide 30 Pack/AirBag, Mammut/Snowpulse 2.0 canister, and refill discs (if I can find them) is up for sale. The tank is full and has never been connected to the airbag (thanks to a lousy winter here in CA). I purchased the pack in late 2013 and I have used the pack for only about 3 or 4 tours so it is in excellent shape.
Local pickup in South Lake Tahoe or Berkeley will get you a full canister. If I need to ship the canister, it will need to be emptied first.