This is the biggest problem with the op.
If you have any intention of breeding, you do not buy animals because they are a good deal, you buy them because they are good quality.
Way to many people get into breeding by trying to buy low quality, cheap animals and then when they breed they make low quality animals with no demand and then wonder why they can't sell them.
If you're serious about breeding, plan to invest in some quality animals or things are not going to work out well for you.