https://www.ebay.com/sch/i.html?_nkw=Minelab+GPX+4500&_in_kw=1&_ex_kw=&_sacat=0&LH_Sold=1&_udlo=&_udhi=&_samilow=&_samihi=&_sadis=15&_stpos=47401&_sargn=-1%26saslc%3D1&_salic=1&_sop=12&_dmd=1&_ipg=200&LH_Complete=1
Unfortunately just sold, but deals like this can be found. $1650 used GPX4500 with 3 factory coils from a reputable Arizona dealer.