If you've had any curiosity about the shop games that came out this year, this is the one to try: TCG Card Shop Simulator is an awesome retail business game, and is getting better and better. Thousands of trading cards, all with original art. Soon you'll actually be able to sit with your customers and play the TCG.
But you sell 8 different packs of cards (soon to be 14). You can open packs of cards yourself, both to add to your collection and to find valuable cards to sell. You can put the cards you don't want into bulk card boxes for sale. You can also place tables and chairs for customers to come in and have a place to meet and play against other customers.
Besides packs and individual cards (plus bulk boxes), you sell various containers for customers to keep their cards in, plus the big collection books. You sell dice, tabletop games, comics, play mats and figurines. They are adding more all the time.
You can do all the usual retail things, like hiring different types of employees, running the register, ordering stock, expanding your store, buying and placing fixtures, etc.
Also, there is an active modding community.