If you’re looking for an affordable, impressive-looking Nano Gauntlet you can actually wear, then Hasbro has what you want in their Marvel Legends line.
Hasbro’s Nano Gauntlet is a screen-accurate replica, and looks just like the one worn by Tony Stark/Iron Man at the end of Avengers: Endgame. The battery-operated electronic toy features articulated fingers, “breathing” light effects, and multiple sounds like those in the movie. The fingers can also be locked into a fist for display.
The wearable gauntlet will be priced at $99.99, not so expensive that you wouldn't mind wearing it for cosplay.