Best Buy has the upper mid-range LG G7 Fit on sale at a discount of up to $230
Extremely similar to the "regular" LG G7 ThinQ from a design standpoint, the G7 Fit downgrades the Snapdragon 845 processor under its twin brother's hood to a Snapdragon 821, while also settling for a single 16MP rear-facing camera rather than a dual 16MP imaging arrangement. The rest of the specifications are pretty impressive for the sub-$300 price bracket, including 4GB RAM, IP68 water resistance, top-notch 3120 x 1440 screen resolution (with a sizable notch in tow), and a bunch of premium audio enhancements (a quad DAC, Boombox speaker, and DTS:X 3D Surround Sound technology).
The LG G7 Fit is technically "universally" unlocked, supporting every single mobile network in the US, but if you don't want to pay $340, you need to activate the phone on Sprint right off the bat and pay as little as 200 bucks, or on Verizon or AT&T and spend $289.99. Of course, you may also want to consider some of the mid-range competition before pulling the trigger. Like the Google Pixel 3a, which currently starts at $200 with a smaller (no-notch) display, slower processor, but infinitely better camera.