I’ve heard it said that printer ink is the most expensive liquid in the world when considered by weight. Not even the finest wines can compare with the per-ounce cost of printer ink.
I bought a Samsung color laser printer a few years ago, and it cost around $250. It came with four toner cartridges, of course, and now that I’ve been using it for a while it’s time to get some new toner. I went online to find some:

Whee! Over a hundred dollars per cartridge means $400 to replace the toner in a $250 printer that included toner. Interesting math.
I guess it’s time to just buy another color laser printer, with the toner inside, and save some money. It’s just crazy.