Do you want an otdr or loss/rfl?

Exfo axs 100 is a very reasonable otdr. Exfo 930 is its brother for doing end to end testing, but you will need another 930 or at least a light source. You could probably get them in tested good condition off Ebay in your price range.

What are you looking to test

Viavi hst 3000 has a pretty good ethernet module I am told. That's also recently discontinued so you might be able to get one cheap