I ship things daily and I think that if you put it in a bubble envelope, And it weighs less than 15 ounces, Shipping via First Class USPS will be no more than $3.50 (usually less.) , even if it has to go across the country . ;)
just do you know they are pencils I'm the colonial times they used mini blackboards in school to right on for notes and homework and such these pencils acted as a chalk, the stone would scrap on the blackboard. it's actually a really cool piece of history!