COUGARCELL via Amazon offers the Simple Mobile SIM Card (pictured) for 36 cents 39 cents with free shipping. That's a buck under our mention from over a year ago and the lowest total price we could find, also by $1. Simple Mobile offers contract-free monthly plans with unlimited talk and texting, starting at $25 a month. Higher-tier plans also include web data allowances. Click here for more information. (Update: This is just a card, not a kit.) (Update 2: This is a SIM card, not a micro SIM as previously mentioned.)

Of note, Unlimited Phones 4 Less via Amazon offers the Simple Mobile micro SIM Card Activation Kit for Apple iPhone 4 / 4S and iPad for 49 cents with free shipping. That's a slight drop from our January mention and the lowest total price we could find by $4. (Update: The price has since dropped slightly to 28 cents. Free shipping still applies.)