It wasn't too long ago that Amazon discounted the sandisk ultra cards, but they have done it again with the 64GB version being marked down to $43. These are awesome memory cards and I currently have one in my Galaxy S3. If you are in the market for extra storage I highly suggest you check this out.
There are also other Sandisk memory devices on sale as well including standard SD, compact flash, and SSD's. Link is below.
Amazon Gold Box Deal