I can't recall being charged less than $6-7 shipping for much of anything, there's some kind of a minimum with UPS and Fedex.... USPS is often cheaper, few vendors ship that way anymore, though....
Toss some other stuff in the shopping basket while you're there, just to make it worth the shipping. Fans, cables, thumbscrews- whatever, the price goes up slowly once you're over the minimum. If you're like me, it'll save you a trip to Radio Shack.