Suggestion on Fiber tester

[Blake Pfankuch - Mailing List <blake.mailinglist () pfankuch me>]

I am in the market for a simple fiber tester.  I have about 80 pairs running through my complex and we are running into 
some possible issues with some of the really old ones.  The pen light to confirm that it's the right strand is going to 
require a little bit more insight to determine if there is an issue with fiber in conduit or patch.

I don't need something super fancy, just need something that gives a good, bad or "holy crap is that concrete you are 
testing on" for starters.  I am also shooting for about $150-250 tops.

Any suggestions?

Thanks!

Blake