Sure, Amazon takes your money for fake SanDisk cards. If it’s “Sold by FlyByNightNeverHeardOfEm” then who knows where that company acquired the product, whether or not it’s “fulfilled by Amazon”. You’re safer buying something “Ships from and sold by Amazon.com” (the link you provided), or “Sold by WellKnownVendor”.
As for SDSDQUAN-064G-G4A, I had the same confusion. SanDisk’s site doesn’t mention an SDSDQUAN product line, only SDSQUA for the Ultra SD line. But if you trust “deponia” on the forums, in another thread he or she wrote:
The SDSDQUAN is the newer version of the ultra card … I would suggest to buy the newer version in order to ensure that you have the new speed and firmware of the card.
The -064G- represents the memory of the card. I think -G4A on the end may represent a European version, or different packaging, or something. It is ridiculous that SanDisk’s site does not have a prominent “Part number decoder” link.
