If you're trying to pick a compact action camera without spending a lot, the main question is whether a used unit can still deliver the video quality and convenience you need. At $100, the GoPro HERO7 Silver puts that question front and center.
Quick Verdict
The GoPro HERO7 Silver is a capable entry-level action camera with 4K Ultra High Definition recording. This particular unit is used and does not include a charging cable, but it charges through USB-C. The bundle adds a hard case, a soft case, and a 32 GB microSD card.
GoPro HERO7 Silver 4K Ultra HD Action Camera

The 2.0-inch screen and compact body make it easy to frame shots on the go. The trade-off is that this camera is sold as used, so you're not getting a factory-new unit.
Who This Suits
If you're new to action cameras and want to try one without a big commitment, this is a practical option. The small size works well for helmet mounting or casual travel clips, and the simple screen keeps controls approachable. It's also a good match if you already have spare USB-C cables and don't need one in the box.
What Stands Out from the Listed Details
The headline feature is 4K Ultra High Definition recording, which is a lot of resolution at this price point. The 2x digital zoom gives you some framing flexibility, and the 2.0-inch screen lets you preview shots easily. With a 32 GB microSD card and both hard and soft cases included, you can start shooting without extra purchases. USB-C charging is convenient when you have your own cable.
Meaningful Trade-Offs
The biggest limitation is that the zoom is digital, not optical, so it doesn't pull distant subjects in with the same clarity as a lens-based zoom. You'll also need to supply a USB-C charging cable, since one isn't included. Those are the two main things to weigh before buying.
Bottom Line
At $100, the GoPro HERO7 Silver gives you 4K recording, a 32GB card, and two cases in one package. If the trade-offs above are acceptable, it's a straightforward way to get started with a compact action camera.