This metal detector is $39 after applying the $35 coupon on the page. It has 4 star rating with 203 reviews.
NHI Classic Metal Detector With Pinpointer – All Terrain Waterproof Search Coil Detects All Metal – Digging Tool & Beginners Guide Book Included – Lightweight Metal Detectors for Adults & Kids
https://www.amazon.com/gp/aw/d/B019INJAH8