Anywhere from a dime to 15 cents open market for 50-100 comes down to a nickle or so by the 1000.

LEE makes a push through sizer to "deglock" the brass. I worked up a cast load for a glock worked fine leading brushed out with a Montana brush in 5-6 passes. The glocks can bulge cases but the 40 I was working with did not. When I work up a load for an auto I start at the bottom and move up about .2 gns at a time untill the action works every time and stop with about .1gn more as it has been where the accuracy is.