Rave Crab
The Rave Crab is an EXCLUSIVE pet that was obtainable from the Exclusive Pets Egg, with a 50% chance of hatching. It was made available in the Mastery Update.
The latest Pet Simulator X value list for Rave Crab can be found below:

Regular
💎 1,700,000,000 (1.7b)

Golden
💎 Not Available

Rainbow
💎 Not Available

Dark Matter
💎 Not Available