Essential Eschatology is 4.99 on kindle

FL does not "match" prices. Rather, they extend publisher sales when they are allowed to do so. I just checked four other stores. Two are at $20, one is at $8 and the other (you mentioned) is at $5. It does not appear that this is a publisher sale, or if it is it is exclusive to Kindle. If you know how long the sale will last, you can wait & see. I think it is unlikely however.