Pricing your art - What is the price of creativity

You’ll hear people tell you about different techniques on how to price your work, but usually these are artists, who mostly do one thing and what works for a classical portrait painter doesn’t necessarily fit someone working with photo / video works. You can’t really charge by the square cm or inch for video, and charging by the minute quite frankly questions the whole concept of what it means to make art opposed to craft. So in the hopes of giving advice that could help as many of you as possible, lets talk pricing!