What do the rich buy that the poor don't even know is available for purchase? (reddit.com)

Elections seem to be the most obvious answer for me.

time

Auto accident liability self-insurance with a large enough escrow acccount (which can still be invested and is yours). You'll also get a fancy small window decal, at least in CA, telling the world this fact (self-insured and registered to the state)

It's not super-rich, but I've only seen people with net worth >$2 million do this

Blood. </sarcasm>

Lots of little things. I have real-life experience with Terry Pratchett's Boots Theory. (I don't know if it had another name.)