Switching to SuperDuke from Versysq

Hello,
I currently ride 2011 Kawasaki Versys in mint condition, great bike, bunch of add-ons but I am looking to switch to KTM, because even though it's a great bike I still need that KTM spirit
I found a few 990 SuperDukes 2007 in the similar price range without additional equipment and have around 20k miles. Do you think this is a big milage for a SD. Also at 6'6'', do you think SD would be a little small for me? From specifications it has 1inch taller seat than Versys, but it looks like a smaller bike.
And I am planning to get it from the dealer or private seller without actually seeing the bike, so does anyone have experience with that?
Cheers

As for size, I am just over 6' 5" and it is still very comfy.

The 990 is a tall bike plus if you set the sag the rear end won't be as soft as stock setting so the bike will be a lot firmer when you sit on it.
I'm 5'6" so the SD feels a bit to tall for me but at your height you will be laughing.

Thank you, that helps a lot. Does anyone have experience buying SD without seeing it? Do you know if you could hire a mechanic to inspect the bike?
Cheers