You can usually tell the serious beach hunters from the vacation guys by the hardware they are swinging. Look at this video and pay attention to the last part.
A machine like the Minelab Explorer has the best of both worlds. A double D coil and lots of frequencies being used at one time. So if you are within 2 hours from an ocean beach with lots of hotels and condo’s then seriously consider buy a better beach detector. You can find the Minelab Explorer SE used for about $500 on ebay.