So, multiple price engines come and go. Why? Because consumers won't pay for them, and so they rely on kickbacks from merchants. Same for Travel sites/aggregators, and for review sites: You either get folks to pay for them (of which Angie's List was the only kind of success) or you get vendors to pay you (Yelp, any affiliate aggregator (Creditcards.com, etc.), price engines).
I guess I wonder: I love CamelCamelCamel, I loved PriceZombie, I loved PriceRunner and Jango and all the rest... but they keep going away. Google killed google shopping comparisons, as did the other portals. We can probably all think of ones we used that are all gone now.
What kind of service would one have to create that grabs prices but can charge consumers so it's not depending on affiliate vig? And given that many merchants are creating terms of service to block displaying of their prices (we see this also in the travel industry), will one of the earliest dreams of the internet, that of a flat marketplace where I can evaluate all players and their pricing and pick the best store for me, still fail to come to life?
It feels like online shopping has become a big mall, where I have to go to as many sites as I can find til I get tired and just buy the thing at the most recent site (or just trust that Amazon is the cheapest). I hope we can avoid this fate.
(Update: fixed typos)