Right now, the lowest price for a Berrok on the Creatu search is 220k. I'd go for 215k at the least.
And since he isn't on your profile, I take it he doesn't have a name yet and is still in your hatchery? That does bump up the value a little, since people like to be able to name their pets themselves.
If you're aiming to sell and he is still unnamed, try advertising him in the Shoutbox or the advertisements area in the Forum for about 250k tu. And make sure to mention that he's unnamed.