For its newsletter subscribers only, Newegg offers the Patriot Signature 64GB Class 10 micro SDXC Memory Card, model no. PSF64GMCXC10BK, for $41.99. Coupon code "EMCPGPD25" cuts it to $29.99. With free shipping, that's the lowest total price we could find for a 64GB Class 10 micro SDXC by $6. It features transfer speeds of up to 40MB/s. Coupon expires March 12.