MarkAssPandibuying pendrives marked as "used" and scanning them for deleted files 
damn one i bought appears to have no files :(
they formatted that bitch properly
well at least it appears that I got 1 tb usb drive for dirty cheap that appears to be actually real functioning
I decided to try get refund, and I wanted to send middle finger to seller but profile looked like it was just some lady that doesn't know shit so maybe she scammed me by accident
update: they denied
Lol
Lol