I had an electronic keyboard on there for $150 once. Guy messages me and offers $50. I replied "lol no" and closed the conversation.
Digital age is great for ease in this case, but it also allows people to be remorseless ********s. Had people just not show up altogether which infuriates me just thinking about it.
At least he didn't agree to $150, then show up with only $50 and not mention this until after you'd helped him load it into his truck.