Samsung 32 GB memory card class 10

Samsung 32GB memory card class 10 with 6months replacement warrenty.it,s just whole sale price please real customer are contract with us,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.