Answer:
I go up but never come down. What am I?
You throw me away, I find my way back. Traditionally, I'm wooden with an arch in my back. What am I?
I am very easy to get into,but it is hard to get out of me. What am I?
I have keys but no locks. I have space but no room. You can enter but canβt go outside. What am I?
When you buy me I am costly, but the only use I have is hanging only. What am I?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?