That line also emphasized her youth. You don’t see Biden/McCain aged guys putting things on Ebay. She’s not going to win over the whole under 30 crowd, but that line shows how she can sound like she’s from the current generation rather than a past one. As Ben points out in a diary, Palin (like Obama) is too young to have internalized the 1960s culture wars (and of course McCain was not in country for them). It’s nice to see the country transition from those bitter feuds.