Google started out with no paid ads and no forcing user accounts, etc. Watched a video clip (yup, BING) that says you are missing most of your search results and perhaps missing best priced items because Google Scroogles' you by filtering what your results are by preference.
Have you done a Google vs Bing search result lately to see what are missing specifically between search results of Google vs Bing?
Clink HERE: To Watch Video On Google Search Results