If you live in New Zealand, a 40ml tube of Cobalt Blue oil paint (high quality, like Sennelier) could set you back $100. Fuck that.
And while some brands, like M Graham have undisputed quality in terms of texture, lightfastness, viscosity, age-resistance, many big-name manufacturers (like Winsor and Newton) are adding more and more crap to their paint in order to, you guessed it, increase their profit margins. Making your own paint is not hard, can be of very high archival quality (once you get the hang of it) and save you hundreds of dollars. I get all of my pigment from Kremer in New York City and Sinopia in San Francisco. Making oil and watercolor are particularly easy. Some day soon I want to try making some casein and acrylic.