'Congratulations! You have a buyer for your ticket'
If you receive an email with this title for your ticket sale from StubHub, you can be assured that it is 99% a scam by some StubHub buyers! This happened to me five times for the same World Cup ticket after I adjusted my price to be the cheapest. At first, I wasn't sure that would be the case, but after experiencing this repeatedly for the same ticket, I am now certain. Some sellers want to keep their ticket as the cheapest one and somehow find a way to buy the cheapest ticket with a method that will eventually result in cancellation. In the meantime, your ticket won't be on the market for at least an hour, allowing their ticket to become the cheapest again.
I don't understand how StubHub allows this to happen, and it sucks!