I’ve only bought a couple of things on amazon.com, since I mainly use amazon.ca. When it gives me recommendations, they’re based only on a few things and are therefore rather diverse:

• A book called Understanding IPv6
• a couple of CCNA guides (I had to look up what CCNA meant – it’s some kind of networking certification)
• 101 Dalmations DVD
• Star Wars: The Clone Wars DVD (which I have, though amazon.com doesn’t know this)
• Tool’s Ænima CD (which I also have)
• Slayer’s Reign in Blood CD

I imagine that there aren’t many lists of anything that both Reign in Blood and 101 Dalmations are a part of.