Does anyone know if chaffee zoo would buy my Sulcata tortoise?... Hes huge

The zoo will not buy animals from regular people

Yeah maybe

Probably if it is healthy than yes

If you still need to rehome him, I work with a reptile rescue in Visalia CA that would take him. They are a non profit so they would not pay for him, but it is run by a knowledgeable retired vet tech and we would find him a good home. Just giving you the option :)