Amazon has a one-day sale on Sony SD, MicroSD, and USB memory — some pretty good discounts here.
The best deal is likely the Sony 32GB SDHC Class 10 UHS-1 40MB/s for $11.99. This is a great deal as similar speed cards from SanDisk or Lexar go for $18-20.
This sale is only today — it ends in just under twelve hours.