Fat-Mango via eBay offers this Folding Credit Card-Shaped Multipurpose Knife in Silver or Orange for $1.99 with free shipping. That's $2 under our Black Friday week mention and the lowest total price we've seen for such a credit-card-shaped folding knife. (It's also a low by $1). It features a stainless steel surgical blade and built-in protective sheath.
From shoes to cookware, if you're willing to pay a little more for these awesome products, you may never have to shop for another again.