Feel bad!

I was off today, so I 'm going to sell my golf club on the internet auction. The starting price is 3000yen. I hope it 's going to be sold for about 8000yen.Is it impossible? maybe? I'm selling my scanner as well. Sometimes I enjoy selling something on the internet auction. I'm excited to see how much the price is growing.
I'm worried about my health, because I felt bad today. Why?