It depends on how much you want. Some are packed, covered and scooped up. The price is different. But the general wholesale quality is almost within 15 yuan. The unit cup is around 7 yuan.
If it is sold, it is recommended to go to Guangfu Road. There is a "franchise store" next to the one on the right, which specializes in selling cups. It will be cheaper here. But if you just buy a few sets, such franchisees are not willing to sell or bargain.
I hope you can buy it here.