It's not easy to see what the price breaks are, and now that it's changing, I'm not going to worry until it changes, but I ship up to 15.9 oz tools in small packages using eBay and Paypal.

One of the ways I figured to sell packs of 20 Phillips #2 screwdriver bits for drywall, is they weigh in at 7oz with the envelop, packing list, bag, tape and label. I just mark them 8oz and pay the same $2.60 each. 25 would put me into the next bracket.

Limit is 13oz at post office or "retail" for some strange reason, but 15.9oz online. Go figure?