Peek-a-Boo ™ ♣ claimed other party abandoned offer
carrieshot ♣™ claimed I agreed to cancel
Carrieshot explained that Peek-a-Boo had send him key to his game before they come to agreement, of how many cards Peek-a-Boo would ask for Masked Shooters 2.
However carrieshot told Peek-a-Boo that he is not going to use the key, since the number of cards Peek-a-Boo asked for was not acceptable for carrieshot.
Carrieshot also provided screenshot of Masked Shooters 2 from his ''license and product key activations'', along with screenshot of his Steam store purchase of Masked Shooters 2. Which date is 25 of August 2016. That proves not only that he acitvated the game about 2 months after Peek-a-Boo failed the offer, but also shows that indeed, carrieshot had bought the game from Steam.
Traders should not hurry to post keys in chat before any additional agreement, especially when no quantity of cards ( or other items ) was specified in this offer.