Heard rumours Hayden isn't up to much but I've not seen to judge fairly. I'd still like to think we could have sourced a better third choice CB and given Chambers a chance to settle in slowly.
We haven't had a lot of luck buying reserve CBs in the past, Silvestre and Squillaci come to mind.
Decent CBs are highly sought after and can go to clubs where they play regularly. Some of the names that were bandied around were just daft, Hummels is not going to come to Arsenal to sit on the bench and wait for Koscielney or Mertesacker to get injured. And Wenger cant just demote either of them or there is going to be a lot of player unrest and players wanting to leave the club to go to a place where they aren't treated as meat.
Most players consider regular first team football as their #1 requirement for joining a club.