That is really odd because I have found Rock Auto shipping costs to be inline with Jegs and Summit... Back a year or two ago, I was buying @ 80 bucks worth of bushings and shipping was almost $ 130.00...
I usually use Norther Auto in Iowa and they charge me what it costs to ship..quite reasonable..
That printout above was from Summit's own billing system..
Maybe your are lucky...perhaps you should buy a lotto ticket as well :)
I got this part for through Chrysler for 11.50 delivered...