Answer:
I look like a tiny trombone
I may only be given but never bought. Sinners seek me but saints do not. (one word).
Soft hairy from door to door. I am the pet that always stays on the floor.
The more you look at me The less you see.
I have a hundred legs, but cannot stand. I have a long neck, but no head. I cannot see, and I'm neat and tidy, as can be. What am I?
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.