Below its ranking (scrolling, not visible in the screenshot) are products with exact same score + more reviews + "funda" in the title. Shouldn't those, by your understanding, rank above the Amazon Basic product then?
Maybe; depending on their age, the content of the product page (videos, comparisons, etc.), delivery time, and the rate at which those who see the listing purchase it (after searching funda). I am guessing that Amazon uses some sort of Bayesian+ algorithm to figure out what to list.
