I am currently in my 2nd season in League one, with Plymouth Argyle.
Not sure what positions your looking for, but if you need a goalscorer, I reccomend Jason Eull. The lad doesn't stop scoring for me, and he's a free agent. Jason Roberts, Luke Moore, Shefti Kuqi are other options for strikers on a free.
If you need something in midfield, Dean Parrett on loan from Spurs provides good talent- At CM or RM.
In defence, Reda Johnson should be available for no less than 400k. But I'm not sure of your budget.