One of my clients is requesting full rights to the images I'm about to produce for them. Contract is signed and they get unlimited usage rights per contract but they want to own the rights so they can resell them if they wish. I originally told them that it is uncommon and not many photographers will actually release the images in that fashion but I also mentioned that I will do it at 400% mark up on my originally quoted price.
What is your take?

Personally, I don't see any reason why anyone would want such rights: such requests are usually based on misconceptions of copyright, usage rights etc.

