One thing that people spend a lot of money on, which in many cases is not a good use of money -- because they are paying for duplicated features they likely get from other options -- is buying Smart TVs.
Smart functions built into the TV are very expensive and add hundreds of dollars to the cost. You often do not need them because you get the same functions in Blu-ray players, Rokus, Apple TVs, Amazon Fire TV and many devices.
Major brands like Sony, Samsung, Toshiba, and others, make big mark-ups on their smart TVs. More economy brands like Visio and others, will add around a hundred dollars or so to the price tag.
We bought a 50 inch basic flatscreen TV made and branded by TCL. TCL is one of China's largest companies and they build sets for many other companies who then market them under their own name. It was a non-smart TV and was nothing more than a 50 inch monitor with so many I/O ports that it was amazing: three HDMI ports, TV/Cable/Antenna, Component, AV, USB, and even a serial port if you wanted to hook up an old computer to the TV. It cost us about $325 on the Amazon Deal of the Day. (I signed up and watch for deals like this.)
TCL makes a Smart TV that is just a built-in Roku and nothing else and it is a great buy if you are sure Roku is the way you want to go.
I just ran over to Amazon just now and I found this Sceptre non-smart TV that sells for far less than a same sized Smart TV. If you plan on getting or already use smart devices, why pay for them twice?