WHAT METAL DETECTOR ?

For that price range, you’ll be getting one that detects all around metals. Perfect for letting you know if it’s junk iron from silver and gold. Good for hunting Meteorites, some of those come up nickel.

Find a shop that sells detectors close by you, so can test drive one. Some are heavy on the wrist, and are not balanced too well.
Good idea if I can find a place that sells them around here I'll do that. Thanks.