Amazon has the SanDisk Ultra Class 10 SDHC Cards for under $1/GB in 64 and 32GB capacities. With free shipping ($0.91/GB), that’s the lowest total price we could find by $2 and the best deal we’ve ever seen for a SanDisk Class 10 SDHC card in these sizes. Class 10 devices can transfer speeds at up to 30MB/second.