Know the Raw Price First
Start from the live price for the required karat, then multiply it by the approximate weight you're looking for.
Expect Making Charges Reasonably
Making charges vary, but when you know the raw price you have a negotiating base — or at least awareness of the difference.
Use the Buy Gold Today Page
If you know the price the merchant is asking, use Buy Gold Today to see the difference between the raw price and what the seller is asking.