I spent most of yesterday in the parking lot of the Sacramento office of the FBI (long story), which is really in the middle of nowhere (off Auburn Blvd, all the way past Watt), and come lunchtime I didn't have high hopes. But my GPS told me there was a Jimboy's about a half-mile away, so I figured what the hell, I could do worse.
But when I got there it was no longer a Jimboy's but a burger place called Flip.n.Shake. Too hungry for further possibly fruitless searching, I decided to give it a try. For $695 + tax I got the California Burger: bacon, avocado, and swiss cheese. Decent-sized, tasty burger, really good bacon (flavorful, semi-crisped but not crunchy), nice avocado. On the whole I was quite happy with it, and it was definitely worth the price.
I did not try any of their sides, their shakes, or their other mains, so I can't say if those are as good. If you're in area, though, I can certainly recommend their burgers.
Flip.n.Shake, 4708 Auburn Blvd, Sacramento