Just saw that the Destiny Taken King (All three expansions) was on sale for $34 with ps plus, this is probably the cheapest price I have seen so far for these expansion. Also if you dont have ps plus, just get a 1 month subscription ($10) and buy the $34 one, and it still will be cheaper than the $55. There is also legendary edition on the store for people who don't have the game.
Kind of pointless only buying the 1 month Subscription as the game is 100% online. Great price though..