I know a local photographer who's been in the business about 25 years. On his website are samples of the various types of photography he does along with his rates. Through his business page, someone contacted him recently with a proposal that went something like this (I'm paraphrasing):
"I love your family portrait work and would like to hire you to do some family portraits of my family. I'll provide you with a memory card, and after you're done taking the pictures, I'll take the memory card home to review them. If I like them, I'll give you $50."
His response was a lot nicer than mine would have been!