tallg,
As we all know, logic and common sense generally applied in the west, is not the same one applied here.
What you are experiencing is what everyone has and will when advertising for a sale.
These calls are either triggered by cultural instincts, boredom (very well spread here in Qatar) or both, definitely not by an interest to purchase what is announced.
As an advice, don't waste too much time on those who would like to chat with you about your bargaining skills/limits.

Good Luck!