Just my luck

Ordered two new reusable moon cups off EBay for next to nothing, am i seeing this right they it has a life span of up to 15 years!? In the past i payed £22 for one and these cost £1.50 each 😦 they were all wrapped and boxed tightly and correctly but i can not believe they were that cheap. Anyways i found out i was pregnant so i ordered another one in the slightly larger size for after birth, do they look reliable? I worry about things off ebay