Our Ecumenical Patriarchate prohibits the use of any and all electronic devices on the analogion (Patriarchal Encyclical Protocol No. 615), so physical books are necessary inside the church. But, printed books in the United States are hard to come by and expensive. Reprints are a great way to get around this issue, because (1) they are old and trusted books, approved by the Ecumenical Patriarchate, (2) can be ordered online through amazon, and (3) are cheap (no profit is being made on any one of the books below, the cost covers only the printing cost).
Shipping cost depends on the country the book is produced and where it's sent. Amazon has printing factories around the world. If you need the book shipped to the US, the cheapest shipping cost will be to order from amazon.com. If you want the book shipped to, Greece, the cheapest cost would be from an amazon site near you (amazon.it, or amazon.de). Copy-paste the title of the book and order it from there. The shipping cost will be about half as that from amazon.com.
Book Physical Quality
The reprints are standard paperbacks. The pages are sturdy, but the spine is plastic (actually it's a hot glue that, when pages are pushed in it, it dries up like a flexible plastic). It could crack flat after a lot of use or if you force it flat. Βookbinder's tape should hold it together for years (see pictures below). The spine also has the book title for easy reference in your library.