I had a similar quote from a chaing store of $250 for just the nav head unit, $40 for the bluetooth, $25 dollars for the iPod and they refused to do the video bypass. The iPod price pissed me off, cost more then the cable.
I called around to a couple independent shops and found a similar rate $65/hr for 1.5 hr install and they will do the bypass.
In my research found out at the big box stores, the install guys get half the install cost and the stores keeps the rest.
Getting mine installed next week once all the parts are in....I can't wait.