It will cost more for you to register the llama than it will for the owner. Alternatively, you can give the owner half the llama's price, and the other half on delivery of the llama's registration certificate to you. This may or may not be possible. But you are better off shopping elsewhere than purchasing what may end up to be an unregisterable llama. Reasons not to buy an unregistered llama You cannot register progeny from an unregistered llama.
Unregistered llamas are worth less than registered llamas, all things being equal.
You cannot show unregistered llamas, except for geldings, in some shows. An unregistered llama is probably the sign of someone not seriously interested in raising llamas, but who is just an animal producer. Health and training issues might also be questionable in such a case.