If you buy generic paper and ink, the price can hover around 25 cents. There are also inkwell mods that take the ink wells outside of the printers and snake surgical tubing into the print heads to save on the cost of refilling ink. Of course, this kind of setup will only pay for itself after thousands of prints.
Regardless, my experience has been that the best quality comes from a professional processing lab, like Clark or shutterfly. They also have the added benefit of costing as little as $.11 per print, with reasonable shipping costs.
Try both your printer and a send-out, and see which one is more convenient for you.
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