the actual B/As we see are mostly algos set to capture retail investors who are gullible enough to believe that they have to sell to the bid or else pay to the ask, exactly as you have advised above.
it takes no more time to look at markets with a smart three-dimensional kind of approach, in order to see which prices are for real & which are the algos.
imho it takes much longer to work up a two-dimensional math-correct approach, for the simple reason that it kow-tows to the algos. As illustrated above.
"Example 2 (above)" "Pay what the seller demands."
"Example 3 (above)" "This is much too difficult for poor lil ole me to think about. Give it up."