0th world problem if I ever heard one, given that the average new cellphone price world-wide is $350. Also, why even set a limit? "If you're too poor to own an expensive cellphone, then suffer with garbage phones!" The price difference isn't parts anymore, it's markup. ALL new cellphones should have reliable biometrics, not just the expensive ones.
If you hate the fingerprinting scanner on your Android phones, you are not alone. Optical in-display fingerprint scanners on many $300+ Android phones remain slow and unreliable in 2026, often failing with wet fingers - even on phones from market leaders.