No purchase necessary and I'm not affiliated with the one putting on the drawing, Chris Kresser, so I don't think this constitutes advertising, but if it does, the moderators are free to delete it. Full disclosure: if 3 people enter the drawing via the link, I get entered in another drawing.

http://bit.ly/yUpg88

I don't normally enter this sort of thing, but Chris Kresser is an excellent Paleo blogger and the Vitamix seems like a good product.