For small lots, a 0.01 g scale that does grams + troy oz is enough—calibrate with a known weight and weigh in a draft-free spot. Many people like the Fuzion BX-1000 class of scales for pocket use; consistency matters more than the brand.
On “fair scrap dealer”: compare their offer to melt, not to retail. For 14k/10k jewelry, rough melt is weight × (karat÷24) × spot for your unit (minus stones and non-gold parts). Local coin shops often pay less than mail-in refiners but you skip shipping and assay wait—get two quotes if the lot is worth it.
Before you sell, run the same math with today’s spot so you know your ceiling—I use a simple browser tool for that:
scrap gold melt value calculator. Not financial advice; just helps me spot lowball offers.