G & D Jewelry Buyers on Chula Vista's Third Avenue operates as a precious-metals buying desk covering gold, silver, diamonds, and coin collections. The shop shares the 255 Third Avenue building with several other dealers in the same block as Martinez Coins San Diego, forming a concentrated numismatic and bullion hub in the Third Avenue Village district. Walk-in evaluations cover estate jewelry lots, individual engagement rings, class rings, dental gold, and circulated U.S. and foreign coinage. The buying operation also handles luxury-brand wristwatches and consumer electronics alongside vintage collectibles sourced from the same secondhand market served by Upright Citizen on Third Avenue. Certified digital scales verified by San Diego County Weights & Measures are used on-site to calculate payouts against live KITCO spot-price feeds for gold, silver, and platinum transactions.