Hi folks, I need some advice. I do a couple of bespoke company Xmas cards each year. Now someone has called up wanting to use one I did a couple of years ago, but put his own clients logos and branding on it, due mainly to lack of time to produce a whole new illustration. There's no work involved for me. Now, this is a first for me, and I don't know what the going rate is to charge. Does 50% of what it would cost for a new illustration sound enough? Any advice appreciated, or has there been a thread on this before?