These wallet.dat scams are so ridiculous.  Like how in the world do people think some body will sell a 31 thousand Bitcoin worth of a wallet.dat if the file is recoverable.  How do they guarantee you are the only owner of it.  They can send you the file and they will continue to have access over it among every body else who may have purchased it.

But then again.  How some people believe some body will sell a file worth over 1 BILLION DOLLARS for not even 0.1 percent of it and even believe it can ever be 'unlocked' is beyond my understanding.