I have several friends that own homes that back up to a golf course. In their experience, there is not a great deal of noise, but rather the contrary. They find it is peaceful and they enjoy the beautiful view. In their opinion, an occasional errant golf ball is a small price to pay for the scenic view and sense of open space. However, as noted in other responses, this is a matter of personal opinion. Ultimately, the seller may set the listing price but it is the buyer that determines the value of the prospective property.