Only found a XS400 for R12500 but a '98 model, must a grey import ? Anyway looking for a 650 and must be way cheaper 
The 400 came in two varieties, the old XS400 SOHC two valve which was similar in styling to the 650 you are looking for. In '83 or so they brought the XS400DOHC which was a copletely different kettle of fish.
I had a 650 and loved it for its roughness and character. If you like old brit bikes or the SR500 you'll like the XS. Being a parallel twin without balancer shafts it's one of few bikes which you can reverse into a gap revving it whilst on the centre stand or wear tires without moving when you apply both brakes idling at the traffic light. Being very easy to kick start mine lost its electric starter and got its battery replaced with something small and lightweight almost immediately.
The XS650 engine was a popular power plant in Wasp side car bikes.
Very lekker performance mods include 12mm oversize (880cc!!!) Wössner pistons & sleeves and Piranha ignition (essential if you don't like points).
I haven't seen many of them here in SA. Might be easier to get one from Europe. Speak to MotoZulu if you're keen enough.