Amazon offers its Prime members the SanDisk 32GB Ultra SDHC Class 10 Secure Digital High-Capacity Card, model no. SDSDU-032G-AFFP, for $19.99 with free shipping ($0.62/GB). (Non-members can spend over $25 for free shipping; otherwise, shipping adds $8.02.) That's $3 under last week's mention and the lowest total price we could find for any SanDisk 32GB Class 10 SDHC card by $3. It features read speeds of up to 30MB/s.

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.