Most breeders will trade a healthy female for a male of similar or younger age without a problem. Breeders need snakes in the 3 year age group as generally if they are well fed they are pretty close to a safe breeding wieght. Also you can have 1 male make out with a couple females. In other words if you have two females and one male you can get two clutches of eggs. If you have two males and one female you can only get one clutch of eggs. Same number of snakes to a collector, but it is a huge difference to a breeder! That is why most females sell for more than males.