As far as your payment info being stolen, I wouldn't be concerned...
No worries there, that's what PayPal is for.
I was talking about their policy for "price mistakes".
HP issued a $200 voucher when they messed up on this price point a couple years back, Walmart only issued a $10 voucher by their big one.
Adorama had a few big mistakes this past summer and didn't do anything.
Everybody is always ready for a cancellation as if nothing happened, but "compensation" is a nice gesture from the companies side too.