Good long lens?
If you're careful you can find a Nikkor 180/2.8 ED for under $300 (but make sure you get the ED. I found mine for $250 a few years ago). Sharp, reasonably light, relatively fast. I'm quite happy to use this wide open. My only beef is lack of a tripod mount.
If you're willing to drop $1100 you might also consider the CV 180/4. If you can find one.