If it comes to giving advice about prices, which I only give when I get asked and not by my own initiative, I always feel it is such a subjective matter.
The only thing I can tell someone is what I would ask for a cat and not so much what they should ask for a kitty with certain traits.
So I always tell people my advice is subjective and based on what I would do should I price that kitty.
Because I'm well aware of the fact an other breeder might give a totally different advice.
I think this proofs there is no right or wrong in pricing a cat and the best thing to do is give a kitty a price tag one feels comfortable with.
I think giving unrequested advice is a little overbearing.
Mind your own cats I would say