Best bet is to use google, put in the tv name and size you want and then after the results come up, select "shopping". It will list all the prices and where to get it. I think most tv's have a year warranty and then you can add on up to 2 years usually through the manufacturer. It looks like 40" tvs are mostly under $250, unless you want a Sony or ultra 4K etc. As mentioned, Roku is a service but they sell tv's set up with it. You really want a smart tv, otherwise you will have to upgrade later with streaming sticks, use wires - cables, etc. as previously mentioned.