Gas prices are inspiring more and more people to shop online, according to a recent survey.

In fact, 33% of adults said they’re more likely to shop using a computer rather than spend their pennies driving to the mall. Almost 60% cite free shipping as a reason to shop online.

Good thing, because retailers use gas to deliver their goods too — and they’re charging you for it. Some online retailers are tacking on 18% fuel charges. Major shippers are upping their rates about 5% this year and postal rates rise next week.

Fortunately, some digging will turn up deals from retailers desperate for business. The Web site freeshipping.org compiles free shipping deals from 650 online stores on one site, everything from Hanes.com to The Body Shop.