Sorry OP you're wrong 6 different ways. The devs created a product and once they sell that product to a consumer they do not have the rights to that 1 copy anymore, and if said customer wants to sell it they are free to do so. They are transferring their ownership from one person to another they are doing nothing wrong.
If said developer wanted to make more profit maybe they should consider lowering their prices when their games aren't worth 60 dollars. Devs and publishers RARELY do not turn a profit so any complaints they make amount to "We didn't make tons of profit because people were selling our games (because people didn't like said game or the replay value ran out) and other people were buying those".
There's used DVD, book, CDs, cars and games, and it's all legal and okay because no one is cheating here.
If said developer wanted to make more profit maybe they should consider lowering their prices when their games aren't worth 60 dollars. Devs and publishers RARELY do not turn a profit so any complaints they make amount to "We didn't make tons of profit because people were selling our games (because people didn't like said game or the replay value ran out) and other people were buying those".
There's used DVD, book, CDs, cars and games, and it's all legal and okay because no one is cheating here.