I only every bought like 2 newspapers regularly, canard enchainé (1.20 euros/per week) and monde diplomatique (5.40/per month). That comes around to 52 * 1.8 + 12 * 5.4 = 158.4 euros per year. So for half the price I get two newspapers with potentially different view on events. 325 euros per year sounds overpriced to me given that I like to hear multiple opinions from different publications. 325 to get access to 3-4 publications that only publishes weekly sounds good.

You can also look at other french journals like mediapart who do investigative journalism. Even they only charge 120 a year (https://abo.mediapart.fr).