I bought a nice Canadian 1954 $1 bill for about $4 USD at a pawn shop I visited a while back. I figured it was a cheap price and the oldest one I had was the 1973 variation, so I jumped at the chance. I understand that there were quite a bit of letter variations for the replacement bills after they modified the "devils face" from the Queen's hair, an example being B/M as the most common one. I was just wondering where the variation N/M stood in the rarity scale. The bill I have is crisp UNC and the serial # is N/M4831496. Oh and I suppose even though the price was $4 I could ask if I got ripped off or not

Here's a picture of the serial, please excuse the blue light that's from the reflection off the holder it's in.
