I bought a refurbished Motic B1 series microscope from Martin Microscope.
http://www.martinmicroscope.com It was recommended by Dr. Rick Latin from Purdue and Dr. Alan Windham from University of Tennessee. It has been great so far, I have had it for two years. It doesn't have a lot of bells and whistles, but does it's job very well. I had it fitted with 10x ocular lenses and 10X, 40X and 100X objective lenses.
Andrew Dalton
Metamora Golf and Country Club