Amazon has the Samsung 64GB EVO Select microSDXC 130MB/s UHS-I Memory Card with Adapter (MB-ME64KA/AM) for $7.99 with free shipping on $25+ or with Prime. Samsung has it for the same price. The 128GB version (MB-ME128KA/AM) is $16 and the 256GB (MB-ME256KA/AM) is $30. These "blue" cards are faster than the "green" EVO Select cards (up to 130MB/s vs 100MB/s).
$7.99 retail: $15Report