How much do they pay for gold per gram? Any ct gold buyer should be willing to tell you what they are paying for gram of 10K, 14K, 18K, and 24K gold according to today’s market price. The amount of money your gold is worth depends on the gold purity (known as karat), weight in grams, and the daily spot gold price, which is determined on the open market. Just as the stock market goes up and down every day, so does the price of gold. Expect a used gold buyer to pay about 80-90% of the top value of your gold. Check the daily price online or in your newspaper before selling your gold so that you know if they’re using a price that is too low.