I just learned this service has a free 30 day trial and contains a ton of old shows from the 1980s including NWA/WCW wrestling.

I have not watched any wrestling since the 1980s but I am very tempted by this, at least for the trial.

I used to watch those old NWA/WCW shows with my grandma and grandpa regularly when I would stay over.

Does anyone have this and is there a lot of content from that specific time period? I really am not interested in anything newer.

Not only are there tons of it, there's tons of documentaries about that era as well worth checking out.