ShadowCreator,
Yes the beach is a great place to detect. If you're talking about salt water beaches and will be there frequently then you will want a specialized detector. They are known as a "P.I." type of machine. The P.I. stands for pulse induction. P.I. machines are fond of iron so be prepared. All the major brands, DetectorPro,Fisher, Garrett, Minelab, Tesoro and White's make one. You may not be able to buy a brand new one within your budget but a good used one can be had. You can use them under water or on land. On land where there is trash, they will drive you nuts as they will find everything however they will go deeper than the land only detector. Most detectors that you see people using in parks and playgrounds are "VLF", very low frequency, and aren't much good on a salt water beach. Go to your nearest dealer or the one listed here. If the dealer tries to direct you to one brand you move on. It's your money not their profit that's important.
HH