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
I was hoping for something much cheaper than $300, but it's good to know this particular model has proven reliable.

Also, what is it that I'm supposed to be looking for? Is wear and tear obvious when examining a stylus up-close?
MoFi -Work with me here - Real Tracking Angle :-) a combination of SRA and VTA my inability to type made it up :-)

All in good fun

Peter