Verb conjugation of "exterminar" in Spanish

I mean every thief becomes excited if he sees such a stupid tourist as I was. Some little children, I think that they were from xyz origin, came to me and offered me a newspaper and asked for money.
I was a little confused because I recognized the voice and I had booked at Luisa's guest house. She explained me that she was sharing the phone with her neighbor and her neighbor was not honest.
The American (his name was Jeffrey) meant that this is the hour where usually the price of goods went down as the sellers were under pressure and did not want to return with the product.