FS Hyperlite Prism Pack
Size Medium Hyperlite Prism Pack. I have taken it out twice -- once for a day of cragging this fall and once for a day on the ice -- so it is practically new.
$325
https://www.hyperlitemountaingear.com/products/prism-pack
Can arrange local pick up in the Mount Washington Valley, or happy to ship, you just cover actual shipping cost.