Re: "Amazon returns is superb"
I bought a couple of 2.5" SATA disks from Amazon to pop into my lab server at home.
Now despite them being identical (but newer) to one that was already in, and put into genuine HP gen8 carriers, the server still thought they were in an overheat situation and ramped all of the fans up to 100%. It sounded like it was trying to take off.
I got in touch with Amazon and outlined the issue to ask if I could swap for another manufacturer, fully expecting to be told no as it wasn't really an issue with the disks themselves so imagine my surprise when I was offered a full refund and told to keep the originals!
Two disk carriers later and they were perfectly good external disks. Two compatible disks from Amazon followed quickly as well.
Not massively high ticket-value items (about 30 quid each from memory) but still amazed they'd do that.
Say what you want about Amazon (and there's plenty to say, one way or another) but they know how to keep customers.