They are about equal in value. There are a ton of 14FF and a ton of 10 bolts out there. I've thrown a number of each in the scrap heap. When they have value is when you need one...like the guy who wants to trade you...that 14FF is not going to do him a bit of good if he needs a 10 bolt. That D60 is where you will spend the ching because they were few and far between to begin with especially in SRW form.