Are three of coins stackable?

The Three of Coins is a stackable effect that increases the chance that the next Ultra you defeat will drop an Exotic engram. Bungie also confirmed that if one doesn't drop then the next Ultra automatically has an increased chance.

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Keeping this in consideration, how many three of coins are there?

5 Three of Coins can be purchased from Xur for 7 Strange Coins. Three of Coins is a rare consumable item that increases the chance of an Exotic Engram drop on your Fireteam's next Ultra kill or completed Crucible Match. One may also ask where do i get three of coins?

What is XUR selling Destiny 1?

Correspondingly, where is xur in destiny 1 right now? Xur can be found in a number of places; the Hall of Guardians, near Arcite 99-40, or in the North Tower, in front of the wooden doors. He can also be found in the Ship Wright area of The Tower near Dead Orbit Vendors. His location varies each weekend, so keep an eye and an ear out.

And another question, is there three of coins in destiny 2?

Three of Coins makes its first appearance in Destiny 2 to help players land more exotic items. That's where the Three of Coins comes in, a single use consumable that will up the chances you get exotic drops as you play the game.