This is the detector we should have. Read the description, "it has a depth finder and it also tells you what type of medal it is and how much it's worth."
http://cgi.ebay.com/a-bounty-hunter-metal-detector-BUY-1-GET-1-FREE_W0QQitemZ320352621729QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item320352621729&_trksid=p3286.c0.m14&_trkparms=72%3A1729|66%3A2|65%3A12|39%3A1|240%3A1318|301%3A0|293%3A1|294%3A50#ebayphotohosting
http://cgi.ebay.com/a-bounty-hunter-metal-detector-BUY-1-GET-1-FREE_W0QQitemZ320352621729QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item320352621729&_trksid=p3286.c0.m14&_trkparms=72%3A1729|66%3A2|65%3A12|39%3A1|240%3A1318|301%3A0|293%3A1|294%3A50#ebayphotohosting