Da Beast is correct. $7 million ain't what it used to be.
I am not sure which player we would need to put us over the top.
Overall the offense is not horrible. (Once they get in sync.) QB, RB, TE, WR are ok. There are 2 rookies and a 2nd year player on the OL. I think they need to be given time. Their PFF grades are decent. Bak will be back and that will strengthen the line.
As for the defense despite the horrible game against the Saints, they are a top ten unit.
DBs a fine. The ILB have been grading out well. Both Preston and Rashad did well. That leaves the DL. Clark had back to back good games. He could use some help. The problem is most of the players would will make a difference are not available by their teams. Those who are available are going to be too expense. Those who are affordable will not be an upgrade over those who are already on the team.
In theory making a trade sounds great. it simply doesn't work out very often. At least not in the NFL.
My vote is to stand pat.