Not a bad price i got a spare as well for my R came from a bike with little miles on but mine is in bits i got the clutch Too, i paid £50 for mine but i only got it for spares incase i strip a gear or break something.. 50AU$ seems a good price and if you can afford it why not. With sods Law your almost putting a garautee on you current bike not breaking, SELL it and the day after will see your gear box in bits LOL you always break bits you dont have spares for...