Vampire Sunglasses is an Octane limited face accessory. Octomon's tracks its price, RAP, value, demand, sales history, trade ads, ownership data, and value changes. It currently has a RAP of 530, 2 sellers, a best price of 700 Robux.
Octane Description
I don't know when you'd need these... because vampires can't go outside while the sun is shining. Nevertheless, these are cool as anything.