new to this thread but i did read it all.
dont sell because of what people say, they are just wanting you to be honest with others that may wish to breed it.
if you cross:
diamond x intergrade = hybrid
carpet x intergrade = hybrid
intergrade x intergrade = pure intergrade
most importantly COASTAL X DIAMOND = HYBRID (NOT AN INTERGRADE)
intergrades are not made in captivity they are naturally occuring animals.
port maquarie animals are naturally occuring intergrades! as far as i aware you dont call port mac carpets, diamonds or coastals (imo they shouldnt anyway) thats why many refer to them as port mac carpets, it doesnt misslead people.
naturally occuring intergrades such as port macs, should be on liscence as natural intergrades and not under either carpet or diamond, if it is i would suspect a hybrid!
at the end of the day its not a bad looking animal, and it would make a great pet!
just my 2 cents.