I'm pretty sure it was not that scientific. I talked to some folks there and they seemed to agree that the buyer likely tried a DVD and called them broke. I just took some random media and burned a VCD of Star Wars Revelations (the FanFlick) including a hirez still for the first track and it played just fine.
I'm quite sure if you got one and for some odd reason it did not work, they would swap it, course, its $4.
I told them they should just get a CRT and have one on display (loop an Ax-Man ad or the like.) If someone has a 13" they want to see go away, we could prolly convince them to set up a 'display').