Gday
If there is any way you should hang on to your Gpx4500 and get a sdc2300 as well, they are a great combination and compliment each other, the sdc will definitely find gold missed by the gpx, and the gpx will get the gold that the sdc wont reach, I would find it hard to decide which one I would choose at a crunch but as I know both the machines strengths and weaknesses I know that the 4500 will get the broader spectrum of nuggets so if I had to choose I would stay with the Gpx as it has an advantage over the sdc in the multiple coil choices alone, and simply better depth, I know that the sdc has new coils out as well but they are a bit of an unkown at present?
If the consideration was that I wanted to backpack into places with a detector, use it on the beach or in the water then of course the sdc would be the obvious choice for that and its also useful as a fold up type detector for carrying on a bike or quad, but at the end of the day I have learned from experience that if you are tripping away prospecting then you need to carry a spare detector as well, as on one trip it actually happened to me as my gpx was playing up and then crapped out, I just continued to plod away for a couple more days using the sdc and continued to get some gold, as where we go is anywhere from 700 to 1000 klms from home, so without it, it would have been game over.
Apart from that the value of the gpx has dropped and it is still a very very capable detector so getting what its really worth will be hard as there are many for sale lately, and trading it you would not get anywhere near what it is worth, better convincing the missus the benefits of keeping both :flowers:
cheers
stayyerAU