As presherwife said you could find out if/when and what type of dogs he wants (like out of coreousity (?sp) and go from there!

God forbid Rio got pregnent, before I got a chance to spay her, and I got mix breed puppies I would deffentatly put a price on them say £50 - £100, so that people "hopfully" would think about it before buying them.
I'm sure its different over here because in any of our papers there are never any "expensive" mix breed puppies, just accident puppies for sale with a small price, heres an example in this weeks paper

German Shepherd x BC puppies for sale,
Ready Dec 20th, boys and girls, mum can be seen,
To good homes £75
That price range is comon! we rarely have signs of BYB and puppy mills! (they are there but not many)
Ky and Rio