Navigation Disc 20940248 For $50?

[hunt4wheels]

I was looking at updating the navigation disc on my 2008 GMC Sierra and found one for $50.00....

I see them going on Ebay for over $100 and was wondering what you guys would do?

I know this is a hot topic so if you wish to PM me that would be fine.

[chrisb1]

I just had the dealer install a factory nav into my 2011 3500HD Silverrado.

 

I bought the exact factory nav from my dealer and the disk part number is 20940248.

 

If you can buy it for $50 it an excellent buy.