>> With this kind of logic, you should bill your customers your years of education, from the time you started to read, and effectively charge them millions of dollars per product. This is so ridiculous I don't even know if there's a name for this kind of fallacy.

I think the fallacy here is that you extrapolate the things you mention to 'millions of dollars per product'. I don't think its ridiculous logic to attach a premium to your 'market value' based on how much (time, money) you invested in your education or side projects, and I also don't think it's ridiculous at all to account for equipment cost and travel expenses to determine the cost of (for instance) a photograph. In fact, I think it's perfectly normal, and I assume the similar logic was used in determining the price of about every product or service I buy. Usually costs like these are amortized over a large range of products ('photos', to stay with your example) and/or a large number of sales, so the numbers don't add up to 'millions of dollars per product'.