A few thoughts on this.
He keeps a very clean house for a musician with young children, or he's gone through some trouble to stage it for the photos.
It looks like he's cleaned up the outside since the last time was in his neighborhood, something he didn't do the first few years he lived there. (I have relatives that live down the street from him, so I'm in the area often enough)
Both of these lead me to believe he may be serious about selling.
For someone that complained that "rentals are substandard" I expected the interior to be a little fancier. Not that it's bad, but it's not really above what you find in rental homes. What's with the 1985 style refrigerator?
Finally, listing the house on zillow at 25% above market value - isn't that what Ardell did about a year before going into foreclosure? Baby Blue may be the next NTS on the block.