I haven’t heard of any particular problems with the 450 but others will chime in. We had an 07 450 for awhile and loved it. That thing sounds practically brand new. If the money is right, I wouldn’t hesitate to buy it. Fair warning, though..... a 450 often leads to a 550 which often leads to a 700. Be sure that is what you really want. If so, buy it and enjoy for many years to come.