any golfers out there

Has anyone bought any of the "used" golf balls from e bay or another web site? I for one think I will try it because the prices are very favorable and I lose balls like there is no tomorrow. If there is water on a hole I will find it. Looking at some Callaways on ebay 100 balls in 4a condition for approx 50.00. Seems like a good deal with no tax and free shipping. Lets hear from someone thats tried it...... 
