If you are using HDR you'll want one of the starter HDR models in the guide here at least:
My best value TVs, 2021-2022 Edition Please read this post before posting and asking for advice. Include all the information we need to recommend you the right TV! Its also worth reading my useful links here: My links & guides (Also found in my signature, desktop view) These are my own...
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Otherwise, any cheap TV you buy today will be fine for SDR and its really just a matter of determining the panel type you want and how crucial it is for the TV to use a 60 or 120hz panel.
OLED vs IPS LCD vs VA LCD Panels One of the most important decisions, if not the most important when buying a TV is the panel type a TV uses. When deciding which TV to go for, you must first choose the type of panel you want from a TV. VA LCD Panels Pros Higher contrast ratio. Deeper blacks...
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If you are just looking for something cheap for SDR use and want a VA panel I'd look at 50" Hisense or LG TVs, or at 55" Samsung AU9000. For 120hz, the 55" Samsung Q70A or Sony 55X85J/89J. If you want IPS look at 49" Sony or Philips models, or for 120hz 49" LGs Nano ones.