Contact Darby Lee on the eaglehawk bendigo goldfinger Facebook page tell him Trent sent ya he does a very informative session on the sdc,goldmonsta and gpx range in bendigo area.
Hi mate,
I have a Whites TDI oz series pro you can take for a swing if you would like to see if you like them it's not forsale but atleast you can try it out.
I brought it as my first detector before upgrading to the gpx4500 they are a very capable detector once you work them out.