Unbelievable! Check out this listing
http://www.ebay.com/itm/WW1-WWII-Ger...item41779971c7 and you will see that as of this writing there are 28 bids for a snail drum mag for a 60s era MGC Luger--a glorified cap gun using the "plug firing cartridge" system! One of these sold on eBay last week for around $100. The mag body will, indeed hold and feed 8 rounds--but whether it can handle real ammunition I don't know. The hollow drum body is constructed of two die-cast halves, no mechanism but a fake winder handle. If it does work with an original Luger, it would be a great display/shooter accessory for those who, like me, live in states with capacity limits on mags. But even for this purpose, I'd say it has been bid up to a ridiculously high price. I'd like to be a fly on the wall when the "happy" winner of this auction discovers that 1) it has nothing to do with either world war and was made in Japan in the 60s, 2) it may not fit an original Luger, or 3) it may not accept real ammunition, or 4) function correctly if it does.
Although these items are fairly rare, I'm astounded that it's been bid up this much, because of what it is. Go figure...