Putting The Con Into Convention

I sell carnivorous plants at local shows and events, including science fiction and comic conventions. It’s not a real convention unless I’ve had this conversation at comic and anime conventions, which is why I’ve mostly stopped doing either:

Rando: “Hey, I came by earlier, and the other guy here at this booth told me that I could [get a discount on this incredibly rare and expensive plant] or [take it for free] or [I could pick it up and take it now since I’ve already paid].”

Me: “The Other Guy?”

Rando: “Yeah, the other guy at your booth. I talked to him about a half-hour ago.”

Me: “I’m the only guy here, and I’ve been here all weekend.”

Rando: “Oh. So, can I still have it?”

The terrifying part? It’s watching the same man going from booth to booth, trying the same routine at each booth in the hope that it eventually works.