I ran a test over a two month period via BST posts and was contacted by multiple scammers trying to sell me very valuable cards, ones friends owned and even one of my own cards.
I went back and forth for weeks with them, messing up payment details on purpose until they gave up.
The pattern they use is a name then a number in their email. Beware!
randalladams466@gmail.com
thomasmills472@gmail.com
richardgravener01@gmail.com
judithjamms061983@gmail.com
mariuszkita399@gmail.com
stevebruce925@gmail.com
jeanmichel22553@gmail.com