Will you use it? How will you use it? You really need to answer those questions for the AppleTV or any streaming box. If you only care about Netflix, you can accomplish that with a $40 FireTV Stick or Roku. If you want to AirPlay you need an AppleTV. If you plan to use Plex, they all support it, but the AppleTV app is top notch.
I am a huge fan, and use 2 of my 3 AppleTVs every single day. The 3rd is used less often only because it is in my basement home theater which gets less use in general than the day-to-day sets.
So for 2 of my 3 boxes, they cost me about $0.30/day for my year of use. Yeah, good value.