Answer:
When you buy me I am costly, but the only use I have is hanging only. What am I?
I have two bodies joined together as one. When standing still, I run and run. What am I?
I go around in circles but always straight ahead never complain no matter where I am led. What am I?
A young man wants to have me but when he has me, he no longer wants me. What am I?
I look at you, you look at me. I raise my right, you raise your left. What am I?
When is it bad luck to see a black cat?