I posted some items on Craigslist for my dad. The site informed me, in no uncertain terms, not to accept Cashier's Checks or money orders as they can be faked. I didn't realize this. Sure enough, the same day I posted, I received two emails from people saying a) they were too busy to pick the item up themselves, b) they would have their "shipper" do the pickup, and c) would send a cashier's check. In one case, the fellow said he would send more than the purchase price; we could then refund him the leftover. Was he from Nigeria?
One item, a trailer, did sell, and my dad was very happy to give it to a buyer who seemed like a perfect match.