I think my partner paid $500 for our current cross breed dog. We're currently looking into a rescue dog, and they are all $300, with sterilisation, micro etc. included.
My parents paid around $800 for our pedigree german shorthaired pointers, about 12 years ago. If i were after a pedigree, i'de be happy to pay whatever the average going rate was, but i don't really see that happening. I don't really have a certain breed that i'de love to own (other than a st. bernard!).