How much would it take to sign him? I think he would be a huge upgrade for us, and yet still wouldn't make me want to rule out a CB at 31 or 34 if either Trufant, Rhodes, or Banks were available.

From Pro Football Focus:

3. Adam Jones

2012 Grade: +10.5
2012 Snaps: 626

Summary: The best-kept secret in the NFL these days is that Adam (formerly Pac-Man) Jones has not just reformed his image but also reformed his play and quietly had an excellent season for the Bengals. The season was so quietly excellent that when it came time to argue about the end of season PFF Pro Bowl rosters, there was quite a pitched battle inside PFF offices between those that knew he had played excellently and those that simply refused to believe the numbers!

In the end he just missed out in a close battle for the last spot in the Pro Bowl roster, but the point remains that he is playing at that kind of level now. Being opposite Leon Hall can’t hurt, and there is obviously a substantial risk attached to a player with his history, but on merit alone there is a good case to be made that he should be the top name on this list.

If your team is looking for an under the radar signing who could be the best player from his position in free agency, Adam Jones could be it.

Here is the rest of the article: https://www.profootballfocus.com/blog/2013/02/22/ranking-the-2013-free-agents-cornerbacks-2/