I'm looking to buy an unfired Glock 26 from a guy at work. It's a KSV serial prefix, indicating it was made around Feb. of 2007. Does anyone know when the brass to face issues started? I'd really like this gun but don't want to have to go back and forth with Glock. If you're wondering, it has night sights and 4 magazines. He wants $475 for it. Thanks for any insight.