The problem is that the price range you're talking about became dead to AMD and Nvidia once AMD started producing their APUs and Intel upgraded their integrated graphics. That meant a large portion of the customer base for the sub $80 market just use integrated graphics now, so production of videocards in that category effectively ceased.
Now there is a card from AMD, the RX 550, that's kind of a throwback to the old days. It's a very lmited card for gaming, but perfect for home theater. The one drawback is price, $80. It has all the latest encode/decode capabilities, and displayport and HDMI outputs though.
If you go with an older generation card you will lose out on stuff like that, although that stuff may be unimportant to you. If I was you I'd do a bit of planning for the future. Do you think 4k might be in your future? HDR? Once you know what you need then you can narrow choices down. I mean, forget the GT 730, a GT 710 might do it for you if you're not gaming. You'd want to be sure of your needs first.