3:00 pm: I respond to ad on Craigslist for a $25.00 bookshelf. 3:05 pm: The seller responds, says he can't meet until 6:00 pm. We exchange numbers. 4:00 pm: I happen to find a nicer bookshelf while doing errands. I text the Craigslist seller to cancel / apologize. 4:01 pm: Receive text: "We had an agreement. See you at 6" 11:21 pm: Seller leaves me the vm.