Sell gold to Valley Goldmine, a Portland, Oregon based gold buyer also paying top dollar for platinum and gold jewelry. Valley Goldmine Portland provides honest, private consultations when you are looking to sell your gold, silver, or other precious metals at our highly secure centrally located offices in Downtown Portland and Lake Oswego off Kruse Way. We are fully licensed precious metal buyers, A+ rated with the Better Business Bureau, and are recognized as one of the top gold buyers the Portland area has to offer.