When you compare it to the price of going to the movies, it's really cheap actually.
If you think about what it costs to see just one movie, a monthly subscription to Netflix is really inexpensive.
この場合、次のような言い方が良いかと思います。
ーWhen you compare it to the price of going to the movies, it's really cheap actually.
「映画に行く価格と比べると、実はすごく安い」
２つの値段を比べているので、When you compare it to the price of ... のような言い方ができます。
ーIf you think about what it costs to see just one movie, a monthly subscription to Netflix is really inexpensive.
「映画を一本見る値段を考えたら、Netflixの毎月の視聴料はとても安いよ」
If you think about what it costs to ...「…の値段を考えたら」という表現もできます。
ご参考まで！
カナダ 
