I know it is hard to find a supplier and make good profit. But they are out there. Even so if the supplier are more expensive than ebay as your example, and it depends where you want to sell it. Many people who sells on ebay or amazon for that instance just copy past the titel from their suppliers site. You have to find the key words. As your example " Tifosi Logic Gloss Magnesium Fototec Sunglasses ".
My guess is a customer on ebay wouldn`t search for Tifosi and see what pops up. Myself i haven`t even heard about it. The only good word i can see in the title is Sunglasses. Is Tifosi a designer sunglasses? For man, women, child or unisex?
So if i put in the title designer sunglasses and come up with as many key words as u can. I think the word designer and sunglasses are probably more chance to hit the search than Tifosi sunglasses. People might be in a hurry, they see designer sunglasses for 103.99 think it is a good price.
And they buy it.
My prices on ebay is not always the cheapest ones, but i do sell. Because i change the title completely in 99% of my listings.
This is my to cent.
Ps! with 103.99 u make a little profit.