jenn- by "bird poop frogs' do you mean hyla marmorata or themoderma asperum.
both are commenly call bird poop frogs. I assume you mean marmorata, also know as marbled tree frogs. this is just one example why I try to avoid commen names.
also the entire genus of theloderma are know as mossy frogs not just corticale.. they are also know as warty frogs and paddle legged frogs. I see corticale and "milks" for sale both pretty regularly. I would actuall say I see corticale more often for sale. I see them at just about every show I have been to.

just for fun- one of my f1 asperum holdbacks