One thing to be aware of about Old Judges is that the technical grade a card gets from one of the grading services often bears very little relation to its eye appeal, especially if you don't care about the (blank) back. It's pretty easy to find very nice-looking Old Judges that are graded 1 or Authentic, and conversely you can find cards with a grade of 6 or 7 but a very faded photo that makes them much less appealing (at least to me, and to a lot of other people). To some extent, market prices of Old Judges go by eye appeal, since a nice-looking 1 with a sharp photo will generally sell for quite a bit more than a beat-up 1 with a faded photo, but it's an inefficient market, and it's possible to find good bargains if you're not too hung up on technical grades. See this post of mine from last year:
http://www.net54baseball.com/showthread.php?t=203387
If you're looking specifically for a Brooklyn Old Judge, most of those players were photographed outdoors near some bleachers, and there are some very interesting poses.