100-200 dollars
You might like this:
https://www.bladehq.com/item—Zero-Tolerance-Rexford-0801TI—52149
and a youtube review of it:
It’s not assisted, but it’s a flipper with a ball bearing pivot, so the blade deploys really well. Titanium scales, 3.5” blade, framelock, and barely makes your price range. I don’t own one, but my best non-assisted flipper does as well as my assisted knives.