The black dot dollar spot items are ringing up at 50% off. There were no signs at my store, but many of these items have an Easter or spring theme to them. There is a chance that you may find these items in the back of the store with the Easter clearance.
It seems like the dollar spot items have been going to 70% off about 2 days after they hit 50% off. These should go 70% off on Thursday.