A new scope of this type would cost at least $200, more likely $300+ depending on brand/quality. The cost of a used one depends on the condition, especially the condition of the optics, which can't be judged from a photo.
As a general comment, I find this kind of microscope very useful for newt-related work. Don't worry about it not having its own light source; mine has a light source, but it's not bright enough and I have to use a separate lamp anyway.