This is a big reason I hate that gun forums suck anymore. I sold hundreds of things on them long before facebook, paypal and all the other crap. Sold stuff in the local classified papers too, in person at race car flea markets, gun shows etc. You learn a lot about clear communication, honoring deals, bargaining etc. Nowadays the feral children selling on marketplace are like nails on a chalkboard irritating with their lack of grey market couth. I have to go a hundred miles out of my way to rescue my child's Christmas present from a marketplace seller, if they jerk me around I will have a lot more to say on this.