See Complete writings of Athanasius.
I bought mine on Oct 4, 2011.
Clicking on the link from my orders page gets me to https://vyrso.com/product/13234/athanasius, but that's just a page that says "That is not a product we currently sell."
If you want to sell books, which I presume you do, links like that shouldn't lead to a page saying "That is not a product we currently sell", but to a page saying "This product can now be found at/in ..." (in this case Baker Academic Early Church Collection (14 vols.).
FYI, there's at least one more ex-vyrso book in that collection alone (Beginnings).
Btw, what happens to the people who already own Athanasius and Beginnings if they want to buy the collection? Do they get a discount? They certainly should. No paying twice for the same book, right?
Oops, I just found you've missed to pull
Beginnings. If anyone wants it, without having to buy the whole collection, hurry up, because it will almost certainly be gone a short while after Logos reads this.