New Idea for Pickers and Dealers! Tailgaiting at Estate Sales!

I saw something interesting when at an estate sale yesterday. At an advertised Estate Sale I visited, there was a person who was parked out in front of the yard selling items! He had his back door opened, and on the back seat was about eight or more handguns, all priced, ready to sell to people coming to the Estate Sale! (I wonder about what he was selling, of course), but I thought it was a brilliant idea to follow someone else’s ad, which will bring many individuals, and tailgate, selling your own stuff! I’d really like to see this expand, and have it be a regular occurrence at sales. People selling collectibles, and antiques, or whatever. Mini flea markets while you are out hunting. Anyone else see something like this?