Answer:
I am a seed with three letters in my name. Take away the last two and I still sound the same.
He has married many women, but has never been married. Who is he?
I am a portal to another world which you cannot enter. Only you can see me but I can't see you.
I can be repeated but rarely in the same way. I can't be changed but can be rewritten. I can be passed down but should not be forgotten.
I have a head tail but no arms and legs.
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.