Eerdmans has a book sale each month. July's is now in effect; it's a great one.
There is a large selection. As usual, the prices in this sale are what I consider fantastic, especially given the kind of books that they sell ("deep," tending toward the academic; no pop-Christian), and the fact that the retail prices are usually what I consider high, but the sale selection books are super-low in price.
There are a couple of ways, that I'm familiar with, to access information about the books, and place your order at the same time. One is to go directly to
Eerdword, the Erdmans blog. IMPORTANT: groups of sale books (thumbnails of them) are scattered throughout the webpage. To get to the first group, drill down until you see a group of ebooks
giving prices and links to Amazon, underneath the books. When you're through viewing those, scroll down until you find some more like that, and so on.
The other way is to go to
gospelebooks.net. They list all of the books in a sale in one place; the place where they are currently listed is at the top of the third page, but when new, additional books are added, the Eerdmans books section will get "pushed down." It's annoying to scroll down, sometimes several pages, to find a selection that you're interested in, but when I have my druthers, I go to
that website.