Okay, first I read this article about rip-off auctions on cruises. Amazing! I guess I'm slightly amazed that people on a cruise buy $30,000 art at an auction. But I'm flabbergasted that naive bidders have no problem dropping $30,000–on "fine art" they know nothing about. And I'm dumbfounded that an auction house would tell bidders that the values are 5x what they actually are.
That led me to the Fine Art Registry, which I confess I've never visited. Great site! I got caught up in this article: Gallery Damage to Consigned Work. Yikes! Can you imagine leaving a piece of art and having the gallery cut out a square (to be tested) without your consent? Artists, beware! This is why you need to put everything in writing. Which led me to . . .
The Andenken Gallery site. It's here in Denver and they post their contracts online (click on PDFs in the left column). Also, don't forget about the wonderful Professional Guidelines from the Society of North American Goldsmiths. They have a model consignment contract under Contracts.