I did buy the extended warranty (220 euro for 2-4 years), and regreted it. You have to stick to the inspection intervals, and have them dome at your dealership. That's every 6000 km for me, and a 50 km trip to the dealer, thus, one day of vacation each time. Sometimes I even can't ride the Versys for weeks when the km are "full" but the dealer has no time for me
I think you can easily do the "small" inspections yourself (6000, 18000 km ...) and save the money.
The most likely things that you might need the warrantly one with V are:
-speedometer mode/reset button
-rust on the frame (below seat, behind side panels)
-rectifier death from plug corrosion
Look up the parts, consider used parts and doing the work yourself, and do the math.
Or prevent this from happening in the first place, by installing foam pads on the frame and a rear tire hugger, and not using the mode/reset buttons much.