Gold trade-in is a term commonly used among jewelers when old jewelry is used as payment for new ones or resale value is determined when it is sold for cash.
Gold jewelry is usually desired for its aesthetic appeal but generally known for its investment attribute, gold is the most liquid asset you can own and therefore for decades it has been the most reliable bail out in times of dire need because of its 2nd hand value.
The most important aspect of your gold jewelry purchase is to make sure you are buying real gold in order for it to have any resale value, the higher the karat, the higher the return on investment, starting from 24kt which is the raw form of gold down to 10kt or 9kt gold. 
Gold has been appreciating in value over the years and is now at an all time high of $3,000 an ounce, this has topped every investment alternatives and has made gold more desired around the world as one item you can count on to appreciate over time.
Gold is not the luxury that you think it is, rather think of it as an investment.
