The Vivo Y20 carries a IPS LCD display of 6.51″. The replacement part is specific to that panel, which is why the price you see is for this exact model and not an average.
A Vivo Y20 Screen Replacement starts at $57.99 at verified shops in Miami, FL. The final price depends on your exact model — you see it before you commit.
Yes — every shop is verified and you see its warranty terms before booking.