I've been kicking around the idea of digital escrow for that sort of thing. I put this file in the digital locker, you pay me money, and when you download the i

I've been kicking around the idea of digital escrow for that sort of thing. I put this file in the digital locker, you pay me money, and when you download the image the locker is cleared out. The purchase price includes the exclusive rights to that digital file and the creator gives up all rights as soon as the locker is opened. File that into "side projects that I'll likely never get around to".