My BB is the easiest place for me to PM. They will pretty much PM anything I bring in as long as it is legit.
As far as Target? Can't stand them. They won't PM anything for me. They look over everything with a fine tooth comb and if they can find one thing off I get a denied. WM is ok, they aren't too bad as long as it is within my area they will do it. I was lucky and got them to PM the WM G.I. Joe steelbook exclusive for $19.99 using the FYE price.
What sucks about BB is that they wouldn't PM the Buy one Power Pack and get one for a $1. But I understand as it is in their PM policy so I can't complain too much.
I have yet to try to PM anything at TRU recently so I'm looking forward to trying.