Someone asked me to do a custom illustration based on one of my stock images. I quoted her an exclusive user license (production price + user license price) but she now asks if there's a non-exclusive option as well, and how much that would cost.

Would it be wise to sell a non-exclusive license of a custom illustration? What would you do?

Everything's negotiable. Just find a price you are comfortable with.

^^ taking into account how likely you are of being able to sell if again (how 'specific' it is), and make sure the non-exclusive terms are clearly written into your licence.

The thing is, I find it hard to decide on a price, if I would even do it.

I'm thinking, since it's custom work, the production price should still be factored in, but with a slightly cheaper user license (but higher than the average stock license price). But it's also tailored towards the client's needs, so perhaps it's not easily to sell to others.

Someone asked me to do a custom illustration based on one of my stock images. I quoted her an exclusive user license (production price + user license price) but she now asks if there's a non-exclusive option as well, and how much that would cost.

Would it be wise to sell a non-exclusive license of a custom illustration? What would you do?

It wouldn't be wise, because you are actually giving her your exclusive time and effort..

Even if you think the file will sell "like hot cakes" you still shouldn't do it.. She is trying to get you WORK for peanuts! Exclusive work is valuable and it can not be sold for RF prices..

It wouldn't be wise, because you are actually giving her your exclusive time and effort..

Even if you think the file will sell "like hot cakes" you still shouldn't do it.. She is trying to get you WORK for peanuts! Exclusive work is valuable and it can not be sold for RF prices..

Have to agree. Even under a non-exclusive agreement, the buyer in this case is still getting more value than they should for a greatly discounted price. They get first use of the image, before it can even be made available to other buyers through stock, and in the end it's still custom work, made to order to the buyer's specs and demands. You don't know for sure that it will turn out like your typical stock work would, so offering non-exclusivity up front can be risky.

Personally, I wouldn't do it for less than the full exclusive price minus 10-15% for non-exclusivity.