You have alot of different ways you can go. You can get huge normal females for $100 or so. They are cheap and everywhere.

You can do pastel x pastel for cheap. I see pairs for $225-$250 regularly
Het albino pairs are only $200 or lower.

There are alot of cheap options available for you. I am driving myself crazy with the ideas of what I want to breed. I like ghosts tho