If you delete an online account it's gone. Don't do it.

In the past games were exclusively on cartridges, later disks before downloading became viable. As a console player on various platforms I have various CIB games which include instruction manuals, basic safety information and current offers. They can also be sold if you want more.

I guess since computers can store more and games are sometimes cheaper, there is also no need to sell old games.

They're probably fake.