Hi Marjorie,
That's a problem right across the board, even wholesalers are now selling at wholesale direct prices to customers through the large outs like Amazon and eBay. Online business of course allows them to do that, sometime using a completely different brand so as not to be discovered and upset their usual customers.
It's hard to compete against dropship suppliers that do it, but pretty much impossible to compete with actual wholesalers selling individual items and volume discounted prices. Just another hurdle online sellers need to try and jump, no shortage of those these days unfortunately.