The Minelab GPX 4500 detector was released in 2008 and discontinued in February 2021. The GPX 4500 is a pulse induction (PI) metal detector aimed primarily at the gold prospecting market but which has become popular also with relic hunters. Note that the sale price of this model normally includes two search coils, an 11" round DD plus an 11" round mono coil. "Return of the Legendary Gold Detector! The versatile GPX-4500 is a proven gold finder with many features and great performance. Incor