Hey Tom, When I had my first gallery showing a year ago I just used simple black frames from Hobby Lobby.  for an 8x10 pic I used a black 11 by 14 frame.  I used a white or very light cream colored mat.  these were for black and white pictures.  As far as mounting goes, we did not dry mount any of them.  They make "scrapbook" corners.  We just used the back that came with the frame.  Mounted the pictures to that.  (there is a bit of a trick to doing that but it isn't difficult.  You just line up the picture, mat, and back with eachother.  Then use a small sand bag to hold the picture in place.  Remove the mat and use the corners to "mount" the picture.  then assemble in the frame.  Don't forget to sign your mat.  I think all total for 10 pictures was about 70 dollars.  I did print the pictures myself but that was part of the showing.  Hope this helps.