I bought an ex-LEO HK USP from a guy who told me his story. He had worked as an armorer for a large California police department. When he retired and moved to this state he knew about the LEO firearm deals and would buy a few pieces, go through them and sell at very reasonable prices, which is how he met me, a great price. He had picked up a number of Glocks, went through them and put them up for sale in the local paper, which is how I found him. He had a guy buy a Glock from him, the guy said, "Can you get any more of these, if so I will buy them as investments" The guy sold five Glocks to this character and one day gets a knock on his door, its the FBI...it seems the guy was selling those Glocks to Canadian gang bangers using his old mother to drive them across a rural border crossing. He was told as a private citizen he could only do around fifty private gun deals before it started raising red flags, this was at least ten years ago. He cooperated with them and told them everything he knew about the guy, etc. He was not in any trouble with the FBI but ended up having conversations with ATF and Homeland Security who left him with unsettling news. They told him because of the different gun laws in Canada, he wasn't off the hook completely because if someone wanted they could bring civil action against him. This was why he changed his gun dealing habits and asked me all the questions including seeing my driver's license and CC permit.