Like everything in life it depends on the point-of-view.
IF "YOU" own something and someone wants to "Bid" on it to "buy" it the "price they Bid" is the price they are willing to pay "YOU" the owner for it. And if you agree that is the price you sold it at.
IF HOWEVER "you" don't own "X" and you want to "Buy" it the person who owns it is "ASKING" for a certain price. That price is the "ASK".
I don't know if this makes it clearer or more confusing. I guess it depends on one's point-of-view. KJB22