Here is Ulta3 Black Plum, $2 from my local pharmacy. Such a great price. And the polish, amazing. I did three coats although that was habit I really only needed 1 and a half.
The pigmentation is amazing and barely any smell at all.
As for the colour. It's exactly a black plum. Lovely deep purple with small red shimmer through it. I highly recommend this to people who love their purples.