Amazon offers its Amazon Prime members the AmazonBasics 16GB Class 10 SDHC Secure Digital Card for $15.29 with free shipping. (Non-members can spend $25 or more to get free shipping; otherwise, shipping costs $8.02.) That's $0.96/GB, $4 under our September mention, and the lowest total price we could find for such a card by $2.

Amazon Prime membership is $79 per year; however, Prime is free for college students for six months, and free for parents and caregivers for three months.