TheBumperSticker.com - Bumper stickers, banners, and stickers with Libertarian slogans and images. - http://www.thebumpersticker.com
Idealogo Freedom Gear - Shirts, totes, mugs and hats featuring the Bill of Rights and Founders' quotes about limited government, individual rights and freedom. - http://www.idealogo.com/
Sisyphus Stores - Products with a libertarian bent. - http://www.mythofsisyphus.net/store/