I haven't found that shipping snafus are solely associated with Amazon or Amazon Marketplace sellers by any means!
I've had issues with orders from Ebay, Discogs and ImportCDs too.
Send your thanks to Mr. DeJoy-- don't blame sellers.
I've also had issues with sellers on Amazon, Ebay and Discogs not adhering to grading standards but still, I've found more sellers than not reliable in this regard.