I have Honda heated grips; they were ordered and fitted pre-delivery so I don't know the cost off-hand.
I don't often use them but find them very effective at the point where, if the weather is very wet or cold and my little pinkies are going numb, they are invaluable.
There's a modicom of psychology, too - I know I can warm up my hands if I need to.
The grips themselves are quite hard to the touch so I slipped Grip-Puppies over them. That cured the problem (and the niggling vibration) - someone, Dennis I think, suggested using foam pipe-insulation as a cheaper but effective alternative.
I would not be without them even though I use them infrequently.
HTH
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Mike - Riding on the right - riding for pleasure!
'09 Silverwing 600 - 'The Winged Express' - Delta Blue, ABS, Heated Grips, Givi Airflow Screen, Utopia rider's backrest, Givi pillion backrest & E52 Topbox, Cortech Super Mini Tank Bag as a tunnel-bag, Starcom Digital Comms System.
www.x9ownersclub.co.uk - for all Maxi-Riders who want to RIDE!
"All that is necessary for the triumph of evil is that good men do nothing."
Edmund Burke