Can I add navigation to used 2015 Ford Edge?

I purchased a used 2015 Ford Edge that is equipped with MyFord Touch Sync 2. It did not come equipped with navigation. I'm wondering if it is possible to add navigation after the vehicle has been sold?

Most certainly, yes. You have the option of either having a Ford OEM unit installed by the dealership or purchasing an aftermarket unit from retailer such as crutchfield.com

If you go the OEM route, it's going to be expensive. The kit alone is around $2000
http://www.oemautopartsco.com/products/myford-touch-sync-2-to-sync-3-upgrade

I checked on crutchfield, they don't have any GPS receivers for your vehicle.

Much cheaper to stick a gps on a windshield clip