Would you pay $400 for a 'designer' puppy?

We just babysat a friends dog who was a Chihuahua mix, and I believe she paid like $800 for it. I can't recall what the other part of it was, but it was one of these new "designer" mixed breeds. It was a cute dog, but as a former owner of several dogs we've rescued from the pound over the years, they were some of the best pets we've ever had. Think what you can do with all that money you would be saving, you can get them their shots or get them fixed if they haven't been already, you can get them a bunch of toys, a new bed, etc...