Rakuten has the SanDisk Ultra 64GB microSDXC Class 10 Flash Memory Card for $49.94. Use code WEEKEND15 to drop the total to just $34.94 w/free shipping!
Alternatively, You can get the SanDisk Ultra 64GB SDXC UHS-I Class 10 Flash Memory Card, also for $34.94 w/free shipping, using coupon code WEEKEND15