Have never paid more then that in UD$ for any of mine. I have a small one that worked great for a Barley Wine that I talked someone in to making. I have lots in the 5 gallon (20 liter?) size and one large one that is 6.5 gallons. I had so many of the 5 gallon ones that I gave one away as a raffle prize. All of the 5 gallon ones I have are old water bottles that have turned blue with age. I also have one fermenting bucket that I use as well as a bottling bucket that I have fermented in. I like glass, just dont trust plastic. It is not natural.But I have never used a glass carboy due to the price. Under $20 for the Bunnings fermenter, it is wort less than the wort we are putting into it.
Side note, anyone see Bunnings now have square 30L drums with the large round opening, they are only just a bit taller, and still under $20. When ever I need to replace mine these are the new puppies.