If you are not the photographer but own the rights to the photograph can the photo be uploaded for sale?  Example, what if you inherited a set of really outstanding photos taken by your parent.  No one else owns the rights, no one else has any legal claim to the photos.  You are the sole heir to the photos.  Can you legally offer them up for sale at a stock photo site?

This question was posed to me and I thought I'd try to find out what others think.
Marburg

Don't count Geckostock out.  While they were slow at the beginning, sales are now starting to move.  I just sold 5 there myself.
Marburg

Snapvillage has an obvious potential. I just had my first 10 dollar sale there, and they're still in beta.

Featurpics, but only if photographers helps by promoting their portfolio there. For me, that's an obvious thing to do since they generate the best profit per sale.

Bigstock has been developing nicely, and with their new price structure, they have the potential to become a proper earner.

And as for Lucky Oliver: to me, the only thing they have proved so far, is that they are good at designing websites. Unfortunately, their abilities to sell my images are close to zero. It's like driving a Ferrari with no engine: completely useless.