I love me some online price wars. When I spotted this super cute Let It All Pinstripe Dress (Jack BB Dakota Diego Striped Dress) at both PacSun and Modcloth, I assumed PacSun would have Modcloth's price beat. Turns out, with applicable discounts, Modcloth wins by 21 cents. That is unless you're buying $60 worth of product from PacSun, when shipping charges go bubye.
(you may also be able to order an online exclusive item from your local PacSun store and have it delivered there for free...it worked for me once, anyway.)