There are many choices for good vintage tuners in that price range. Do yourself a huge favor, spend a little time at http://www.geocities.com/tunerinfo/.
If you want to purchase new, I highly recommend you contact Don Scott, who used to review tuners for S'phile, you can find a link to his e-mail at the above site.
You could easily spend well over a $1000 and still not equal what you would get by purchasing a good vintage tuner.