Digital microscope recommendations


I'm at a point where I am concerned about the wear and tear on my Lyra Delos, and would like to check its condition through a microscope. Does anyone have a brand/model they can recommend at a reasonable price? Also, what am I looking for? Is any possible damage so obvious it doesn't need an explanation?

Any advice would be greatly appreciated.
actusreus
By far the best most reasonable priced one I know and that I used nearly every day is this.

http://www.bigc.com/
Jtwrace,
How much did you pay for it? For some reason, seller sites do not list the price for this particular model. Thanks.
Some models are $150 and they go on up. The one that I use is $550 and it's used in a lab.
http://www.microscope.com/dinolite-am413ztas-10x50x-220x-polarizing-p-1003.html