Opportunity is missed by most people because it is dressed in overalls and looks like work. - Thomas Edison
I charge $25 an hour for art with a $25 minimum. The only people who don't pay something for art are people with high res one color stuff already ready to go. The art charge also applies to sep time. On average I would say people pay $50 for me to create simple one or two color spot designs (this is most school stuff) or $50 to sep their 3-5 color spot stuff. On the more complex art that I create and sep, people usually are paying around $100 and rarely more, and I usually probably undecharge for those jobs, but also typically try to use them to learn from (either new techniques in PS/Illy or in the actual printing process) so I am ok with that. I don't think I've ever charged anyone more than $150-$175, and those prices are pretty much for hand illustrated stuff that I am outsourcing at least a bit.Honestly, most of my clients either provide art or are on a budget, so they are willing to pay for seps or for something simple, but rarely both. I pretty much discount the complicated stuff not so much to win bids or whatever, but more to actually have those kinds of prints come through my shop. If I didn't, I would rarely get to actually print the challenging fun stuff.