Hi
I think paid £80 for THIS at the Melbourne vintage fayre, Have to say it's a great pistol/carbine!
I holds a heap of BB's and will shoot them at around 500fps as fast as you can operate the trigger! In the U.S. they're ful;l auto but we're not allowed full auto so there's ploates covering the switch for full/semi auto and the burst rate
The stock and extension simply pulls out to make it an out and out pistol
I'm not sure how common they are to find though
John