When the Apple TV 3 was announced, I went on Craigslist to by an Apple TV 2. I figured that they should be selling for between $60 and $70 CAD. I was so wrong.
Used Apple TV 2s were selling for $90-$100 CAD on Craigslist even though the Apple Store periodically had refurbished ones for $79 plus taxes and a full 1-year warranty. Jailbroken TV 2s were selling for $130 and up. Total madness.
I finally snagged a refurbished model after I realized the used TV 2s weren't coming down in price.
During that shortage between the store shelves being cleared and the ATV3 announcement they were selling over $100 at Amazon Marketplace. (I sold mine for $93)
I was expecting the ATV3 to be more of an improvement than what we got so I think that to many then the benefits of jail breaking a 720p device are worth more than having a 1080p but very little 1080p content.