I had a very unexpected email from someone today asking how much I would charge for licencing of one of my images ("Pearls and Oil") and possibly others to use as a background on a CD rom. They advise that less than 5000 units will be produced. Thing is I have no idea how much I should charge. I don't want to be greedy but also don't want to give it away, I guess... any advice?? Also, is there anything I should be aware of in regards to granting a licence? Any advice at all is appreciated.