In eBay maximum Sellers buy product form amazon in low price and sell at high price on eBay which is called reselling of that products.
It provide geniun product but at high range as compare to amazon because max of the seller buy product from Amazon and sell on ebay this is true you can cheak this you also find that this is right conclusion for this wabsite.
If you purchase with this wabsite then also cheak and compare the price of that product on amazon.
Because according to my experience in this wabsite 75% products copy of amazon at high price.