You mean someone buys this stuff?

You asked who buys this stuff? Who sells this stuff?

As far as “risk-taker” sellers go:

• “Nobody ever lost a dollar by underestimating the taste of the American public.” ... PT BARNUM

• “in what business is there not humbug? “There’s cheating in all trades but ours,” is the prompt reply from the boot-maker with his brown paper soles, the grocer with his floury sugar and chicoried coffee, the butcher with his mysterious sausages and queer veal, the dry goods man with his “damaged goods wet at the great fire” and his “selling at a ruinous loss,” the stock-broker with his brazen assurance that your company is bankrupt and your stock not worth a cent (if he wants to buy it,) the horse jockey with his black arts and spavined brutes, the milkman with his tin aquaria, the land agent with his nice new maps and beautiful descriptions of distant scenery, the newspaper man with his “immense circulation,” the publisher with his “Great American Novel,” the city auctioneer with his “Pictures by the Old Masters”—all and every one protest each his own innocence, and warn you against the deceits of the rest. My inexperienced friend, take it for granted that they all tell the truth—about each other! and then transact your business to the best of your ability on your own judgment.” 
  ― P.T. BARNUM The Humbugs of the World: An Account of Humbugs, Delusions, Impositions, Quackeries, Deceits and Deceivers Generally, in All Ages

• As far as potential interested buyers go ….They do walk among us ….more than you might think.

Are they joking?

I'd like to see it set up with a Koetsu Coralstone, and a two year old running around the room.

The milkman with his tin aquaria??

@thecarpathian “… The milkman with his tin actuaria??”

Yep. This metaphor initially confused me too .

It was explained to me that this was old-time lexicon for the shady,  bottom-feeder milkman getting his milk to market made of the cheapest-you-can-find materials jugs such as tin …. This apparently is a past-era phrase of now verboten containers that leached  toxic and higher levels of a number of potentially toxic metals.