I sell a fair amount on Armslist and for the most part all legit but at least once or twice a month I will get an email starting simply as Dear sir, Do you still have___ available? Once I reply then you get the pitch and it is so obvious it is a foreigner trying to use the correct English (Flag 1). It is always mentioned that I may be shy because of past dealings but I want to assure you that I'm legit (Flag 2). I'm willing to pay your price plus shipping to my ffl. sometimes even sending a copy of a ffl. (Anytime this happens, I look up the ffl and contact owner. usually they are aware some scammer is using their ffl.). Absolutely knowing at this point that it is a scam and I have some time, the fun starts. I respond like an eager beaver telling them I might make an exception to ship but I am going to charge a premium for shipping since it is a hassle since I live in a very rural area. Of course they readily agree. The last one wanted a gun I had listed for $600 and I told him that the total price for gun, shipping and my time would be $1000. Of course he agreed and just wanted to know where to send the Cashiers check. After I've jerked him around enough I usually tell them to send to me in care of the local Alcohol Tobacco and Firearms office and include their real address which ends the deal and the other I use is send me a copy of your drivers license so I'll know you are of legal age. Of course it stops them as fast. I have even followed up after that asking why they didn't follow up on their end of the deal and then answer my own question by telling them I know they were a scamming SOB from word go and then have a few choice words to say about their mother and sisters and just lay it on as thick as I can possibly be. My mother would disown me if she know some of the things I say.
One thing I have found from talking to several legit ffl dealers that somehow have had a copy of their ffl lifted and these guys using it is after reporting to the ATF, the investigation always finds that all of this is done from out of the country through several different routers and is impossible to trace and they have associates in the US that will send the fake Certified Check. And if someone does send a gun, usually the house is just an empty rental that some poor smuck is paid to just sit there and sign for stuff and he has no clue what he is involved in.