Common examples that are given are consumer goods, like household appliances. I tried ‘hoover‘, ‘washing machine’, ‘hair dryer‘, and I had relevant results: deep link into relevant and safe stores, both web-only and the web-arm of brick-and-mortar. However, I'm searching from abroad (France) and not in English, obviously.
i use thefind.com for product search instead of google. they bought like.com which will hopefully help them out in this area. peter yared (author of the article above)