Definitely fishy. Could be be thieves, identity grabbers, or the govt. There has been a lot of burglary rings from SA busted lately, most of them husband/wife teams, sounds like gangs arming themselves though "vendors". Remove the guns from your address to a safe location for a month or so, and batten down the hatches. Do not contact this person, sounds like a setup. This is going to get worse as the economy goes south.