I've used Scribble Pads from the Dollar Tree, there are 40 sheets per pad for $1.00. If you don't do much, that might be best. If you PP a lot, you will want to find it cheaper. Scribble Pads are 9x12, so I have to trim them to fit in my printer tray.
And yes, keep the stitches really small and the paper pulls loose with ease.