Hello @Maddie_Davis @little_dog,
As @Sparkling_Juice has stated, Any listing that is created without identifying the exact item that will be sold is prohibited on Gameflip.
Creating listings where the Buyer has a “Random”, “Chance”, or any sort of probability of items receive will fall under this. Listings that do not identify the item to be sold will be deleted and any accounts associated with the listing may be suspended or banned.
You can report the user by clicking on their profile and clicking the 
button.
Light Speed! 