I've posted this before:

I found a good deal on some retro video games on Craigslist and messaged the guy with an offer slightly lower than his asking price. He agreed, and we set up a time to meet later that day. It was about a two to three hour round trip, but there were a good amount of valuable games that made it worth it.

Anyways, as you can probably guess, he messaged me when I was nearly there and said that he had to raise the price after researching them online. I was pissed, but kept my cool and told him that was fine, and that I was nearly to the meeting spot.

In actuality, I had already turned around and was headed home. When he messaged me about 10-15 minutes later asking where I was, I proceeded to lead him around town to about five different places, pretending to be lost and having him believe that my GPS on my phone didn't work well.

After wasting about an hour of his time through travel and waiting for me, he finally said that he had to leave because he had plans. I asked him where he was and if he'd wait 10 more minutes for me to try and find him. He agreed, and about 15 minutes later, he texted and asked if I was close. I finally told him that I had already turned around, and that I hoped he enjoyed me wasting his time as much as I enjoyed him wasting mine.

He sent threats and insults for the remainder of my ride home, and I laughed the whole way.