The liter bottle of HC-110 which I popped open yesterday was the first I've used in about two years since the price doubled. BHPhotovideo where I usually get my film won't ship HC-110 any longer, so I put in my order with Freestyle where I also get my Unicolor kits for color work. The price for the HC-110 was $35.99 plus about four bucks for USPS shipping.
While I was sufficiently irritated with the price gouging to avoid buying the HC-110 for a long time, the truth is that even at the current price the developer is still one of the most economical resources for home black and white film processing. The concentrate is used by most people in the 1:32 one-time-use Dilution B form. That means the liter bottle will produce nearly 8.5 gallons of working solution to process around one hundred rolls of film. In fact, it is possible to go to Dilution H with little loss of quality, and get twice the mileage. For the specifics of mixing and using HC-110 the best source of information is still the old Covington Innovations web site.