I thought I would elaborate on my feelings when it comes to making the decision to frame or not frame.  There are a few ways to go when buying my artwork as a print.  Most choose a gallery wrapped canvas print or print on paper that is matted and framed.  I feel the difference between a framed print and an unframed one has more to do with your setting and how you like to present artwork.  Presentation is up to you.

Gallery Wrapped Canvas Print:

If you were buy a canvas print without a frame I suggest gloss canvas, gallery wrapped, with black sides.  The gloss is important because it protects the print and it adds depth to the colors while giving it a nice finished presentation.  Gallery wrapped is important because the canvas is stretched onto 1.5″ thick stretcher bars that are strong enough to be hung without the support of a frame.  If you decide to frame your canvas print I prefer modern floater frames, but there are many other more classic style frames to choose from.  In either case, if you are framing your canvas print you can opt for the 3/4″ thick museum wrap frame which is a little less expensive and gives your more options for framing.

A Print on Paper, Matted and Framed:

A print on paper with a mat and a frame also looks very nice.   Generally the cost is equal to buying a gallery wrapped canvas print without a frame.  The artwork as a whole would also take up more physical space on your walls (something to think about).  I would suggest archival matte paper or somerset velvet paper because they reproduce artwork very nicely.  Also I would choose a mat color that matches the painting and/or  your space.   For the color of the frame I like black, brown, or gold colors.