That seems like a rare case to me. Typically there's a company name or model number somewhere on the item, and often that identifier returns a very specific item.

Looking around my house, I only see a few items that don't have unique identifiers like furniture or plates/utensils. However, I suspect the majority of things sold through Amazon/eBay are more likely to be video games, books, toys, etc. with very visible and highly unique names.

Consider fashion or home goods. Frequently you see something you like based on pattern, texture etc that cannot be easily described in words. Image search is the perfect fit for these kinds of purchases.

In case of goods from China brand name and model can be useless because a lot of products are just the same thing but just with a different fly-by-night Chinese firm logo on top.

Image search could be useful if you want to find all the listings for a specific Chinese product and compare prices or revisions.