text: if an ad said 18 kt yellow gold mens wedding band gp! does it men it is real?, how much should you pay for it?   the gp in the ad most likely refers to the fact that it is 18kt gold plated, meaning it is not solid gold. as far as how much to pay for it, look for similar items on websites such as ebay, overstock.com, etc. to get a guideline for what used, plated jewelry is going for.