Well, the mid-2nd-round numbers I gave above accounted for some slipping, since he was projected as a first-rounder, and I did point out that he would have an earlier start to his next big contract. My numbers were meant to point out that Collins' agent had enough ammunition to make the threat not to sign reasonably credible, and and that's not even counting using the threat that Collins would decide not to sign out of spite at the team costing him over a million dollars, compared to either waiting for next year or becoming a UDFA with a 3-year contract. (Just as Bo Jackson supposedly refused to sign for the Buccaneers for sabotaging his college baseball career.)
Seems like the threat that Collins would not sign was credible enough to scare off the whole NFL from taking a flyer on him with a 7th round pick, despite an obvious high level of interest in him as shown by the post-draft courting. He managed to convince all the teams that really wanted him to play for them that they were likelier to actually get him by waiting for the UDFA process and wooing him than by drafting him in a late round.