Ligonier Ministries has a "$5 Friday" sale each Friday. I'm on their mailing list, and got an email from them today which notified members on their mailing list that 1) their $5 Friday" sale for this week already has started, and 2) there are many more resources this week than usual--they say 75 of them.
They are calling their sale this week a "Black Friday" sale.
The sale includes hardcover books, paperback books, book bundles, digital downloads, ebooks and audiobooks, study guides, CDs, and even DVDs.
As a personal aside, what savings that you can get in flat-price sales can range all the way from "meh" to fantastic. The deals on items that are usually priced closer to whatever the flat-price is are "meh;" on the other hand, deals on items that are usually priced much higher than the flat-price are the better deals. If you are a deal-hunter, look for items that are regularly priced the highest.
Ligonier Ministries is a Reformed (think of "reform" as it is used in "Reformation Movement") organization. They are heavily Calvinistic, although they also respect Martin Luther's contribution to the Protestant Reformation.
If you're interested in this sale, point your browser to
this website to find out more about the sale, including to see all of the resources in this sale. If you would like to see the materials, sorted by format, go to
this webpage.