The asking price is not based on hard indisputable information. It is an opinion of the listing agent and the seller based on their understanding of the comparable sold homes, their motivation and the current market.
Your offer should be based on your own agent's research of comparable sales, the condition of the home and your motivation.
Some homes are listed at a low estimated value to encourage multiple offers and result in a quick sale. Others are overly optimistic as the value. They don't factor in deferred maintenance or even damage which must be corrected in order to sell.
It's very important that you have your own agent to do the research and review it with you, to ascertain the popularity of the home and advise you to a winning strategy if you want the house.