This year, I have bought about a dozen knives under $100, such as Civivi, Sencut, Kizer, QSP, and Vosteed, most of them button-lock flippers. Out of the box, all of the folders dropped closed. None of them have any blade play. They all have decent or excellent steel. One of the Vosteeds is good (where did I put that Raccoon Dog? Maybe it's in a pocket somewhere.), but the Valkyrie tends to stick closed unless I push the button. That's a better record than I have had with more expensive Spydercos, although almost all the compression locks I've had have been excellent.
I'm looking for a Petrified Fish but so far have not seen one with features I like.