:werdMandatory disclaimer - SUPERSPORTS ARE FCUKING TERRIBLE FIRST BIKES. GO GET A STANDARD OR CRUISER AND PUT 5,000 MILES ON IT, THEN GO GET A SUPERSPORT BIKE.
Now that that's out of the way, that's a damn good price if all it needs are new sprockets & chain (they all ought to be changed out as once). At 28k, it should have had the valve clearance checked very recently. Find out if it was done. It's a big, pain in the ass thing to do, especially if anything is out of spec.