Pennsylvania's background checks are up and down lately. It was a three hour wait the other day and a few times it has been completely shut down. They are having trouble keeping modern guns in stock. Local gun shop still has plenty of older stuff in there but basically very little in the way of "plastic" pistols, AR's, AK's, short shotguns, etc.
Your lucky for a three hour wait. On Friday NJ NICS was still working on last Saturday's.