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Hyper Pink Lvl5 is obtainable from the Crown Jewel (also known as Casino) Robbery, in order to get a lvl5 one, you need to have a lvl4 hyperchrome in your inventory.
Pink LVL5 is currently performing quite mid, with it being massively overshadowed by Diamond and Blue LVL5 (both of which are doing way better than Pink is). While Pink may get the occasional overpays due to it being quite rare to find, the demand for it isn't as good as other above average hypers (Diamond/Blue LVL5) and is similar to other average ones (Purple/Red LVL5).
Duped Pink LVL5 isn't performing all that well, being a lot worse than Diamond LVL5 (despite both currently being at the same demand), and being more comparable to Duped Blue LVL5 at the moment. This isn't particularly looked for by traders due to it being quite common to find (unlike the clean variant), which hurts its demand quite a bit. It usually goes for base value in mid demands and no more than that.
Supply is widely distributed — no single holder owns enough to register as a hoarder.