Retrofit kit for 2006 E60 Navigation.

I was browsing eBay a few weeks ago and ran across what appears to be an official listing for the BMW E60 retrofitment kit for Navigation. Looked fairly complex. Also listed at $4000!
Can this be the real way to update my E60 2006 (530i) to add NAV? Has anyone attempted it?
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Sell your car and buy one with factory fitted nav. You won't get hardly any of your money back fitting a genuine aftermarket kit, so money lost.
Alternatively, buy a portable third party navigation unit, or Smartnav.

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Apparently it's the Genuine BMW retro kit typically available in Europe only. All BMW parts, etc. STill, for $4000, I am thinking I'll wait till next car in a few years.
regards,
Leroy wrote:

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snipped-for-privacy@comcast.net wrote:

Search through this group and you'll find plenty of options and opinions.
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