I bought 500,000 FIFA 16 coins, listed up the cheapest player I had that would sell for 500,000 coins, but after a while I got a copy pasted email from mmoga saying the player wasn't unique. I checked the listings and there was indeed another player for the same price which had been put up at pretty much the exact same time mmoga emailed me, several hours after I made the initial purchase.
However, it was only the prices of the players that were the same. The Date Issued, Games Played, Assists, etc, all of that was unique. I kept giving them the information but they just sent me the copy pasted email saying "List another player!"
Here's the thing - the email contained a link to a new form for me to input my new player auction, but it would only allow VERY EXPENSIVE PLAYERS! It wouldn't let me list up an IF worth 50k, the lowest cost player they would let me use was IF Sturridge, worth about 300k.
So I paid for 500,000 coins, listed up a player worth 50k, they refused to buy it and kept trying to make me list up a more expensive player. Stay away.