Used bows are a great bargain - like golf clubs they lose about 40% of their value in a short time and most have lots of life yet - owners of good bows tend to take good care of them. Find your proper draw length and pull a few different weights to see what is manageable. If you are small framed or older 50-60lbs might be where you need to be. Most adult men can pull 60 lbs untilthe let-off is reduced with some practice. Just because your bow can be set to 70 doesn't mean you have to have it there. If you pay attention to your bow, wax the string often and replace it every few years you can use a good bow like a Mathews or Bowtech for many years.