2007 Nav Radio Swap Possible?

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2007 CX9 Touring
Hi

My CX9 came with the Bose radio with 6 CD drive.

I noticed a used 2007 CX9 OEM nav radio with disc and gps antenna selling for $100.

Just wondering if this is a plug and play job?

Would a OEM backup camera work with the radio?

My goal is to keep the car somewhat stock but get a backup camera for the wife.
 
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2008 Mazda CX-9 Sport AWD
Curious about this as well, my girlfriend just got a 08 Sport and I am curious how tough it'd be to upgrade to the nicer nav unit. Not really concerned with the nav working , backup camera would be nice if I could install one. Thanks in advance!