I'm not sure if this was discussed before, but at least I couldn't find it.
As freelance type designer, I'm getting used to make budgets for retail and custom projects. That's the 'easiest' way of charging for my work. However, I think there are other/different ways of dealing with this part of the business and I would like to hear your stories.
Example: I'm discussing a budget with a foundry (client) for a retail project and the client doesn't want to pay me the amount of money I'm asking for the project/time of work. I would consider accept the amount he is offering me ++ royalties of the sales.
Does this kind of deals happen? What would be a fair deal?