I haven't read this thread in days. Mike, have you ever considered that you might be wrong?
You aren't the end all decision in this industry, you can only make decisions for yourself on what you are willing to pay for a normal female. You cannot force anyone to change the price of any animal, you are not them.
Have you ever seen a het red in person? Have you ever seen a clutch of co-dom black backs in person? Have you seen them ALL, or only a select few?
I ask because you tout yourself as if you have, and that you are a Connoisseur of black backed animals.
Like Tosha said, and I have said, and others have said.... A snake doesn't have to be completely free of dorsal patterned dots like Robins to be a black back!
Robins is an EXCELLENT example of a "non het red" black back!
There are varying degrees of this feature just like any other characteristic.
Just like a reduced animal doesn't have to be 100% banded to be considered reduced.
It looks better that way yes, but if it has 20% of spots on the back, and the rest is clean, wide and black like the owners... yes... people consider "black back" as a perfectly good description.
Do you see the similarities? The first picture isn't as clear and perfectly positioned like Robins... but it is VERY clear they carry a lot in common.
It's one thing to have an opinion, but when you start parading it as a hard fact in the face of many other more experienced opinions; telling others that your way is the only correct opinion; your going to be told otherwise.
I also find it interesting that whenever someone has a problem with a repeated answer they are getting, they are being "ganged" up on.
Consider the idea that you may just be wrong Mike! Consider the idea that your idea of a black back is very particular, but not the only correct definition!