Selling a 1oz Gold Britannia?
Here’s the playbook:

• Check spot – know the live gold price (Kitco, JM Bullion, etc)
• Pick your buyer – local shop for quick cash, online dealer for top dollar, P2P if you trust the trade.
• Know the spread – Britannias usually sell right around spot, maybe +1%
• Cashing out – fiat sure or BTC if you can, but Uncle Sam still wants his cut (20–30% federal cap gains)

When buying, expect to pay +2–5% above spot + ID required