[tgflynn]

Well for the things you mentioned, health insurance and broadband, there's often not a lot of competition here, with only a small handful of choices available in any particular area. Also health insurance is usually either through your employer, who will offer only a limited set of plans or "Obamacare" which is all very complex and differs a lot from state to state and even between locations within a state, but there are government websites for finding plans.

For physical products there's Google Shopping, which will usually get you a pretty good idea of the price ranges for an item. For large items, like cars, I'm sure there are several specific sites for those.

I'm not sure there's a huge unmet need here. Could you give some more examples of how people would use these types of sites ?

EDIT: Also for many products (especially lower cost products) it's hard to beat Amazon's prices and their customer experience is so much better than virtually everyone else's (both online and in terms of how the deliveries are handled) that it's often not worth shopping around much.