I wouldn't let my breeder female pastels go for any LESS than $1500. How many breeder pastel females are available out there in the market? Markus Jayne was correct - the animal is far more valuable staying in his collection than selling it. If he's going to part with it, then the price he lets it go for needs to make it worth it to him.
It IS rude to TELL a breeder that their price is too high. It's their animal, they know what their price point is that makes it worth it to them to let the animal go.
However, there's nothing wrong with asking "would you be willing to take $XX for it?". But telling a breeder that you've seen others for less isn't cool in my book. If you've seen others for less, buy from them. You obviously liked mine better, or you would have already purchased the other less costly animal.
BTW, I don't know what line that pastel is that I posted above, nor does the breeder (he bred 2 mixed line supers to the mom, and there's no way to know which male sired her).
My other pastels are NERD lemon pastels (as verified by Kevin).