From what I'v seen, people usually work out something based on the clutch (first pick, second pick, etc.), or the owner of the male gets to keep the breeder female in exchange for the whole clutch. It really depends on what each breeder wants out of the deal, but I haven't heard of anyone simply paying a stud fee for breeding, probably because there isn't any guarantee on what will hatch (usually). A Schnauzer and Schnauzer are going to sire Schnauzers; a Pied x Super Pastel het pied can produce a wide range of animals (in value, especially).