Questions from Wendy Wahman

Freelancers, Wendy wonders the following:

• Do you get asked to work on spec? (For example, to produce samples of specific characters or enviroment)
• If so, how do you handle this?
• Do you have a price range cutoff?
• Do you decline to work on spec for magazines, but will you provide samples to book publishers?
  

If you have experience with this, please share it in the comments.