I've watched people join the cash table with $100 and walk off with several thousand - I've actually seen it many times. Many tables have a max buy in (like $200 for the lower buy in tables) and when you see a guy with five stacks of $100 chips, you know he had to earn them. Screen shots? Taking pictures is against the rules in ever single casino I've ever been in, and the Casino is not going to take pictures for under $10,000 grand or they'd be taking pictures all day.
he could be a liar, but who knows?
I say congrats - go out and get yourself somethjing nice Better yet, save up another G and enter the big one