Use of "Although" and "Still" in a sentence.
Are these sentences grammatically correct?

Although this is very expensive to afford, still he can buy it.

Although he is bit nervous, still he can overcome his nervousness.

Although this option has some disadvantages, still he has to accept it as he has no alternative.

Question

Use of "Although" and "Still" in a sentence. 
Are these sentences grammatically correct?

Although this is very expensive to afford, still he can buy it.

Although he is bit nervous, still he can overcome his nervousness.

Although this option has some disadvantages, still he has to accept it as he has no alternative.

Answer

Although this is very expensive to afford, he can still buy it.

Although he is bit nervous,  he can  still overcome his nervousness.

Although this option has some disadvantages, he  still has to accept it , as he has no alternative.