A few simple request to make it easier for a group to coordinate when to buy certain game for group.

1- Allow multiple wishlists and let you rename them. If setup, when you'd click the wishlist button, it would let you check which wishlists to add it to. So you could set one up as "group game".

2- Allow you to keep purchased game on the wishlist if you want. When purchasing, you could have a check to keep it on the wishlist. This way you could see when something is on good discount for the rest of the group even if you already purchase it.

3- Shared wishlist for groups, anyone in the group could add to it and look at it. Bonus point if member of the group had some way to indicate their personal interest in each game (say a simple emoji face system with happy, neutral, sad or numerical score).