Hello,
We sell on ebay many years ago , we are a SanDisk official dealer, and we selling on eBay.es from many years ago.
There are a few sellers offering genuine SanDisk products on ebay so you can not say “all the SanDisk cards on ebay are fakes” although most of them are 
My advice to the other user is NOT TO BUY SanDisk cards from China, we have bought some in the past to make tests and for show to the people how to check and see the differences between counterfeits and genine cards. We made benchmarking tests and use the Crystaldiskmark and H2testw , and the results were than some of those cards were hacked cards, and have 4GB instead 16Gb or 32GB. In other cases were microSD cards “labelled as SanDisk” that had 32Gb but they were not SanDisk.
There are some sellers that use to sell SanDisk cards in “bulk” format, that means without the SanDisk retail blister, and those cards are cheaper than the blistered ones. The thing is that all the people who buy the cards in “bulk” dont have the guarantee as they are buying the original. SanDisk only sell cards in “bulk” to the mobile operators and manufacturers of mobile devices, as Nokia, HTC, Samsung, as they can include these cards in its mobile packages when selling their unlocked phones,etc… In the rest of cases as far as i know SanDisk will not distribute in bulk to end users.
We have detected sellers who sell the microSD 32GB original but using fake packages, in such case SanDisk will not give warrany to those products as they told us when we reported this case. I saw in the past a buyer complaining in these forums regarding a microSD 32GB bought on Amazon , the card had serial number printed on the front, the card had 32GB but the blister was a cheap fake, SanDisk answered they do not provide guarantee of that card.
In Hong Kong you can find the microSD 32GB around 40-50 USD, most of them are in bulk and they don´t have any guarantee in Europe or USA, is like playing the “russian roulette” you can buy from China and cross fingers, maybe you are lucky and have the genuine one.
Another thing is to check the back of the blister and see the part number of the card,
SDSDQM-032G-B35 (Europe)
SDSDQM-032G-Axx (US)
SDSDQM-032G-PXX (Asia)
My advive is to buy these high capacity cards from trusted sellers and check the country origin so you can be sure that your card will have the SanDisk warranty in your country. In case of problems you will have to return the card to the chinese seller as SanDisk will not assume or open a RMA if the card has not been sold in the authorized market.
If you think the card you found on eBay could be a fake, just send an email to brandprotection@sandisk.com with the item number and direct link to the listing.
SanDisk is a member of VeRO program on eBay, that means they can remove inmediately all the SanDisk products they suspect are counterfeits.
Hope this can help to the other user.
