I’ve sold some gear on CL for “almost” as much but met at a location of my designation (changed the location at the last minute on purpose) and packing my daily carry.
My own practice, when dealing with values over $200, whether buying or selling, is not to have either the cash or the item.
Once I've made contact and determined that I want to move forward, I call the wife and she arrives in her car with the item/cash. She is also carrying, in case things still go bad after all that.