You might find on the web a few posts about how horrible Dubli is and that is is a scam. My understanding is that the main problems were with something called the “Market Place”. This was an area where individuals could place items for sale in a similar way to eBay (Dubli is a reverse auction however). What happened is that a number of people did not fulfill the sale. People were scammed but this was not really the fault of Dubli. Because of the complaints, Dubli shut down the “Market Place” and now only sell new products from authorized resellers and themselves.

(See also this newer post about whether Dubli is a scam or not)