Doesn't "pro painted" simply mean "professionally painted" - meaning the person has enough skill that they could earn a livelyhood by painting? If so, this meets that standard, though I agree with the complaints made above.
What I agree with is that it isn't "master class" or "golden daemon" quality. Indeed, while it is solid, it is uninspired and apparently done by rote. It has no "pop". Part of that is colour scheme, part of it is lack of conversions (and those that are done, like the sandbags, are done poorly - sandbags have corners!) and part of it is that unless you are picking up the minis and squinting at them, the models look rather lack-luster.
However, IMHO, he can price the thing however he wants. It is no insult to me - a seller can ask for whatever he or she wants. Doesn't mean he won't be disappointed, as I agree that few people would pay that much for that army. That said, all it takes is one, and if he manages to sell it, kuddos to him.
Inquisitor Psychologis Ruminahui