I've had my Amiga 500 (512k expansion) since 1989. I got it (boxed) from some guy that was selling it in the Dallas Morning News classifieds. The Dallas area had 3 dedicated Amiga stores and a place that rented Amiga games, along with console games.

I made a couple of gameplay videos from my Amiga last year. I couldn't film it with my capture device, so I ended up using a camera.

Gauntlet II: This is an excellent port of the arcade game.
https://www.youtube.com/watch?v=BRrrc6EQmh8

N.Y. Warriors: This is an overhead run n' gun game that utilizes the memory expansion (1 meg total) for the Amiga 500.
https://www.youtube.com/watch?v=v81xKfSvYag