There are not many services that offer same service that we do. advantages: 1. You can show ads in more than 98,000 markets in Adwords, 55000 in US alone. No one can have all of the data for all of the markets, if they are scrapping they are getting the result for where their servers are, not where your market is. for example if you are a flower shop in NY, you don't care what ads are showing in SF. We don't have much data already, but we start collecting it for you once you give us a keyword and location.
2. We are showing all the copies of all the ads showing for any keyword/location not seen that anywhere else.
there are more, check out our sample report and you can see what kind of data we provide. Or you can create login with any google account(free trial, no credit card needed!) and put in some keyword/location and see for yourself.
We scrap the data every hour.
In reality we want bids, negatives, etc. Not to mention it's impossible to know what audiences they are using, their remarketing strategy etc.
None of that is realistic though :P
I agree with you that price is the most important data, but as you said I don't think there is a reliable way of getting that!
How useful you find this service as is?