I've seen stainless steel gutters, or so I was told. It looked alot like galvanized.
Young I am lucky enough to have a nice list of subcontractors. I call 'em up and ask what's what and get good guestimated pricing based upon the details I gave to them. I have a few guys who do standing seam roofs. Kynar steel, the kind that is pre-painted, costs me about $10 for labor and material to put down per square foot. Obviously detail work and pitch costs more. This is for the Chicago area.