I suppose when you buy something with the intention of making sales and profit from it you're not necessarily aware that someone else is giving it away free.
I wonder what is an acceptable mark up for both your time; the original investment; and the ingredients you use in the process.
In the UK you don't buy petrol cheaper anywhere else than the Supermarket filling stations; one of the most expensive places to buy commodities is Harrods...such are the economies of scale of the western world.
Ever tried any of Neil's style files that he has produced himself, Mark?