If the bike is in good shape overall, it looks like a pretty good deal. I would definitely do the cam chain tensioner and maybe the swingarm bushings (upgrade those). Even at that, at $4400 if the rest of the bike is good, you have a lot of good miles left in there.

 

I put an S&S Gear Drive and 510 cams, at 15,000 in my 04 RKP, to avoid the tensioner deal.

 

Looking at the RK in the picture and $4400 looks like a deal based on those pics.
You will have to inspect the tensioners, replace if needed.

 

It's probably a 5 speed. After riding it for a while you may wish you purchased a newer bike with a six speed trans. Just saying. Ask those that have had the 5 speed then upgraded to a newer bike with a six speed.

 

If you go for it, make sure you take a look at other work that can be done while your in there. Make a plan and do the research, get the parts.. all that cause if your replacing gaskets you do t want to leave something off the list and wish you had gone for it a year later. I did cams and all the associated upgrades just because I wanted to have it tuned by a dump guy. Didn’t want to pay for the tune twice.