Amazon offers Prime members the SanDisk Ultra 32GB Class 10 SDHC UHS-I Memory Card
, model no. SDSDUNC-032G-GN6IN, for $9.95
with free shipping
. (Non-members can spend $35 to bag free shipping; otherwise, shipping adds $8.) That's the lowest total price we could find by $3. It features transfer speeds of up to 80 MB/s.