As an AI language model, I do not have real-time access to current deals on Amazon. However, here are some popular brands of 50 inch smart TVs that are often available on Amazon, and you can check for current deals on these brands on Amazon's website:
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Samsung: Samsung offers a range of 50 inch smart TVs with features such as 4K UHD resolution, HDR, and voice control. Some popular models include the Samsung TU8000 and Samsung Q60T.
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LG: LG offers a range of 50 inch smart TVs with features such as 4K UHD resolution, HDR, and voice control. Some popular models include the LG 50UN7300PUF and LG NanoCell 81 Series.
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Sony: Sony offers a range of 50 inch smart TVs with features such as 4K UHD resolution, HDR, and voice control. Some popular models include the Sony X800H and Sony X750H.
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TCL: TCL offers a range of 50 inch smart TVs with features such as 4K UHD resolution, HDR, and Roku TV. Some popular models include the TCL 50S425 and TCL 50S535.
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Power Guard: Power Guard offers a range of 50 inch smart TVs with features such as 4K UHD resolution, HDR, and voice control. Some popular model include the Power Guard PG50F4K.
Please note that deals on Amazon can change frequently and may vary depending on your location and the retailer. It's always a good idea to check the current deals and prices before making a purchase decision.