This card looks like it is a legit deal. They are sold on Amazon and on eBay for around $22-30 bucks.
It has around 29.7gb space available (which is about right), tested with h2testw and verified.
But when you get to measure its speed: It cannot even reach 7 mb/s writing speed. I emailed the seller and he agreed to refund 30% of the cost. See the attached image.