The base game is $20. The two expansions are still selling at full price - and the TDB has certainly depreciated in value. By the time September rolls around, HoW would have also depreciated in value. If you think about it, Destiny has lost 2/3 of it's value. The two expansions are $35 - which would be about $12. So, you take the $20, $12 + $40 - you get $72 combined package. Add a package discount of $12 (which is very close to the package discount of $10 when new) - you get the $60 price.