Is the Heritor Magnus worth $120?

At $120 it is a low-cost way to get a steel automatic with a date and sapphire-coated crystal. Expect basic finishing and modest accuracy rather than luxury-watch quality.

No. It is rated to 50 meters, which covers hand washing and rain but not swimming or showering.

How often do I need to wind it?

The power reserve is 36 hours. If you do not wear it daily, wind it or reset the time before wearing.

How big does it wear?

The case is 43mm wide, 45mm long and 13mm thick. That suits medium to large wrists; smaller wrists may find it bulky.

Does it have GPS or smart features?

No. It is a mechanical automatic watch with a date, luminous hands and no connectivity.

Automatic watches like this often dip during holiday sales and end-of-season clearance. The current $120 at eBay is already near the bottom of its recent range.