@Sally671 just updates reply to you with explanation. Stand corrected - has nothign to do with my initial thought.
So, here is what happening.
When one searches for location without specifying dates - airbnb presents list of properties for different totally random dates with the price displayed being price of the last day in that range.
IF you did not set custom price for those dates - it most liekly uses "base price" - one more reason not to let airbnb to use any defaults - setp rpices yourself, select huge range and set price. This will overwrite "base price"
That was simple Watson
P.S. Guest fee is at least 15% on ABNB