I don't buy memory cards from ebay anymore, back in the day where I wasn't as savy... I thought oh wow... well cheaper... After several months of usage the memory card would crash... data got corrupted and when I went to format the memory card on a laptop... it came up as 32gb rather than the higher memory I bought.
All memory cards I have purchased from Amazon direct have been perfect in my experience.
Sometimes you can tell by the printing design on the memory card if it is a bit shabby... if seller has returns active on the account... then I would arrange a return.
Also, after doing a Google image search, it seems the tone of the memory card adaptor looks a bit darker than it should be compared to ab official Samsung one. Could be the lighting... but seems deeper on your one.