EBay is not a store

What is the point of including eBay and Amazon in the comparison results? They're marketplaces, not stores like the other supermarkets. Plus they generally add on a delivery charge which greatly affects the price conparison. Also, Ocado has a minimum spend of £40 so it dosen't help to find one item that is cheaper there. Please remove these online only sellers from Trolley. Or at least have a filter so the user can opt out of online sellers.