Sony 32 GB Secure Digital High Capacity (SDHC/SDXC)- Class 10 /UHS-I 40 MBps Read - SF32UY/TQMN for $17.99 + free shipping
$17.99 w/Code: MLCKDM10L1 For First 200 Orders, thereafter $21.45. I have ordered from meritline many times and always been satisfied.
Also, Summer Sale 20% Off Code: MLCSUMMER20. I don't know if they can be combined, but it's useful if there's other stuff you want.