Trading one beret to a hydra card would be ridicilous, no offense there.
I mean, I checked the prices and berets were 70k~100k while hydras were from 1,4 mils to 2,6 mils.
So, if you wanna trade it to a Hydra card, you've gotta gimme a better deal, like 10 berets for a hydra card :D
PS. Berets are drop is over 10% (echio) it's just that I'm feeling too lazy to hunt them :D