Door-to-door flan salesman

The other day I was leaving my apartment and as I was locking my door I look down the hall and see a gentleman knocking on someone's door, about 3 doors down from me. He was holding a box and saying something towards the door. I could tell he was selling something. I begin walking in his direction just as he was giving up and moving to the next apartment. He sees me, and takes out a small container from his box and lifts it towards me. "Tengo flan!", he exclaims and stares at me as if I'm supposed to be very happy about this.

"Umm, no, gracias", I say, and continue on my way.

Are you kidding me? This guy was a door-to-door flan salesman? Home-made flans? Who buys flan from a complete stranger who walks up to their door? Isn't flan supposed to be refrigerated? It was all pretty bizarre.

I wonder what his success rate was?

P.S. - Gabe, I know you would have bought one if he knocked on your door.