Gold Dredge Concentrates seem to be a vary popular item on ebay. Many different sellers offering there sluice material, after a hard days work. I assume it's to practice panning, or getting a chance to have a payday. Something like buying a lotto scratch off ticket. I'm sure the majority of Sellers of this item are honest. I have seen a few that sell concentrates, here on ebay. There is a alarm going off just by looking at there feedback. They are also buying very small quantities of gold, a few grains or grams, from time to time. It is a simple scam, add a little color to some bag of Mother Earth, then make a little more, charge alot for shipping, Instant 300% profit. I have dredged & high banked for almost 20 years, a days concentrates might add up to 5 pounds dry, some of these sellers of concentrates must sell 20 to 100 pounds a week??? Feedback is a Valuable ebay tool, use it, or loose it, after all its your bag, not mine.