Also available is the Lexar 32GB Platinum II Series SDHC Memory Card, model no. LSD32GBBBNL200, for $26.95. Coupon code "WPPI201432" cuts the price to $14.95. With free shipping, that's the lowest total price we could find by $8. It features read speeds of 30MB/s.
Amazon offers the SanDisk 128GB Ultra UHS-I microSDXC Memory Card, model no. SDSDQUA-128G-G46A, for $119.99 with free shipping. That's the lowest total price we could find by $80. It comes with an adapter and purports to be water-, temperature-, X-ray-, magnet-, and shock-proof.
Note that it's expected to ship in four to six weeks.