Archetype photo’s vs. placeholder

For context:

Users can search for products and find listings of products with photo & product details. But there are also a lot of products with no product details & photo of the product, only a unique product title, location & seller.

Problem:

Is it better to show these products as listings within the search results, with a placeholder image (usual grey mountain & sun) or use an archetype of the product (such as a generic bike for all bikes without a photo) with a disclaimer that the actual product may differ?

By showing the archetype-photo of a bike, it reaffirms the user that his search has indeed came up with bikes, instead of giving no visual feedback with the photo. What is your opinion on this?