UPDATE 6:41pm ET: there is a newer U3 “up to 95MB/sec” model that goes for $23 with a limit of 10 as well at Amazon by Amazon itself. Thanks to Scott for pointing it out in the Comments!
More PoNY action, this time it is an SDXC card. The 64GB PNY Elite Performance SDXC UHS-I U1 with up to 90MB/s (I mentioned this because it’s part of the model name and card face, so you can tell it apart from other models; I am not doing Memory Card Performance Measurements and Tests), model P-SDX64U1H-GE, is on sale for $23 with a limit of ten units per customer at Amazon by Amazon itself. The usual free shipping terms apply (Prime or $49+ total/$25+ books).
The newer, faster version (95 MB/s) is available for the same price ($22.99) from Amazon
https://www.amazon.com/PNY-Elite-Performance-Speed-P-SDX64U395-GE/dp/B00WWBCSG4/ref=dp_ob_title_ce
thanks for the alert! I updated the post to reflect that!