Adorama is having a sale on Lexar SD/SDHC/SDXC memory cards. There are three Adorama pages of offers, a total of 41 listings. To quickly skim/scan, pay attention (no pun intended?) to the prices in "red link". Capacities range from 16GB to 256GB, and Lexar "ratings" range from 200x to 600x Professional. Free shipping. Sale ends by 5/31/14 or earlier for any that sell out.
Funny thing, not so long ago, we thought 4GB was a HUGE amount of storage for a memory card, and the companies behind the specification apparently thought that too :)