I loved mine, sold when I sold all my too many machines, nothing wrong with it. Metal body, one of the longest running lines Janbime has ever produced. I 'think' the P might relate to more stitches per minute, it is advertized as beiing for bag makers. there is a good 6600 group on fb, the price for used ones is probably all over the map because it's been around for so long.
sit down and drive it with some of your own fabric, make a couple of blocks.