I found mine on ebay couple of years back, it looks like Nikon (clone?).. Optically and mechanically very good. It came with 0.5x magnification reducer, which is also working as distance extender. It was (I think) ~$150..
Definitely a good buy!
The whole assembly was on home-made(!) stand (quite adequate) which I replaced with
wall mount for LCD TV.. it is much more practical this way.
I also added white LED strip (wrapped around the lens) for object illumination.
Later, I purchased
another one (for the company I worked for then).
It was also quite good and I used it very often for SMD work in the lab.
However, it has some issues: the lamp was very bad and bulb (built in and spare) burned very quickly, so I replaced the whole illumination (transformer) system with LED torch and adequate regulated power supply.
It was also a bit harder for me to get the image in both eyes simultaneously without rubber cups.
What is good about this particular model is huge working distance (it was designed for dentistry work), so there is plenty of space between microscope lens and object to operate various tools.