Nitya-siddha and nitya-baddha are both the make-up of EVERY marginal living entity.

Nitya siddha and nitya baddha are NOT separate individuals as some preach. Nitya-siddha and nitya-baddha are both the make-up of EVERY marginal living entity.

Nitya-siddha is ones original condition, when they choose to miss use their free will and reject their own nitya-siddha body in Vaikuntha or Goloka-Vrndavana only then does their 'conscious awareness' becomes nitya-baddha in the material creation Srila Prabhupada confirms this

Srila Prabhupada - "By following the rules and regulations and instructions of the spiritual master, he can also become siddha. He can become again nitya-siddha. So the Krsna consciousness movement is to make the nitya-baddhas again nitya-siddha, to bring them. It is a difficult task." (London lecture BG, Ch 2, 13-14, July 14, 1973)

Srila Prabhupada - "Your next question, "Is a pure devotee "eternally liberated" and if so is he at any time a conditioned soul? We are "eternally conditioned," but as soon as we surrender to Krsna do we then become "eternally liberated? 

You are NOT eternally conditioned, you are eternally liberated but since we have become conditioned on account of our desire to enjoy materialistic way of life, from time immemorial, therefore it "appears" that we are eternally conditioned. 

Because we cannot trace out the history or the date when we became conditioned, therefore it is technically called eternally conditioned. Otherwise the living entity is not actually conditioned. 

A living entity is always pure. But he is prone to be attracted by material enjoyment and as soon as he agrees to place himself in material enjoyment, he becomes conditioned, but that is not permanent. Therefore, a living entity is called on the marginal state, sometimes this side, sometimes that side. These are very intelligent questions. And I am very glad that you are putting such intelligent questions and trying to understand it. It is very good." (Letter to Aniruddha dasa, Los Angeles 14 Nov 1968)