Pandoras box cheap cheat

What's up guys, just bought Pandoras box for 40 bucks total on sale. Such a great bundle. I first purchased borderlands game of the year edition for 9.99 and then instead of buying Pandoras box through the store for 50.00, I bought it from the home page of borderlands 1 game it says you can buy the bundle there at a discount if you owned any of the games& I thought it would be 10.00 off Instead it was 20.00 off bc borderlands is usually 20.00 but it was on sale for 10 and I guess it didn't recognize that. Idk how long Pandoras box is on sale for though but I recommend doing what I did if you are new to the game.