Stuff like this is all over craigslist. After my experience with trying to get Saints tickets off of there, I won't think about buying anything from anyone without a phone number or some kind of attaching information. Gotta be careful bro. People like this stryker guy have been doing this for a long time. They know what they're doing. I'm sure he'll tell the next person in line he needs the money ASAP.
Hopefully you get your $1000 returned or a fresh set of headers.