GameAgent offers Steam downloads of Borderlands: The Pre-Sequel and Season Pass Bundle for Windows or Mac for around $16, via the directions below. That's $4 under our mention from May (which didn't include the season pass) and the best price we've seen. (It's also a current low for this bundle by $9.) To get this deal:

1. Add the Borderlands: The Pre-Sequel and Season Pass Bundle to your cart for $20
2. select "AUD" as the payment currency
3. check out with PayPal, yielding a final price around $16