Hoo, yeah, I see your point. Unfortunately, it seems like this is how property is trending, with consumers only being able to rent their content, not actually own.
So, I haven't used these sources myself, but I've put together some sellers and links in our FAQ page.
Or, "Europe Comics" was another online seller with traditionally high-quality content, but as of two years ago, they stopped dealing directly with consumers. You can still purchase their ongoing content evidently, but through sub-retailers, FWIW.
Let me know how you make out?