Some people are still selling the last of the 2011 babies on kingsnake. A baby blacktail male won't set you back that much money.
I'm planning on breeding the "unicolors" and black tails this year, but babies won't be ready until summer if the breeding schedule works out the same as in past years. My uni male is off feed which is an indicator that he should be ready for his girlfriend soon. My male black tails aren't showing signs of being ready yet.
If you've never owned a cribo before, start with a baby. An adult black tail is an intimidating animal - quick moving, strong and with an aggressive feeding response. It's much easier to start with a juvenile and grow into the snake.
They key to these animals is to keep the ambient in the mid to low 70s and to make sure they stay well hydrated. You can't keep them like a ball python or a boa - they do not handle temps over the high 70s low 80s well at all.