Not every saller have the same…
Not every saller have the same reputation as they published. Example for many shop who claimed can send diamond under 1 minutes, in reality much of them send the diamond 5 min up, and some of them didnt send it unles you give some protest to the seller. Well even for the instant feature, you will find some seller overclaimed it. Better go to other aplication, a lil bit expensive (arround 5idr/diamond) but they send it faster than most of itemku seller.