I know that systems like https://uk.camelcamelcamel.com/ exists, but they provide static graphs, not data. keepa.com also looks useful, but it appears (as far as I can tell) to present you with a static graph of the data, but not the actual values themselves.
So is it actually possible to obtain historic amazon or eBay data? And are you allowed to use it under amazon/eBay T&C’s?
Furthermore, are you allowed to store the data? I mean, how did/do https://uk.camelcamelcamel.com/ and keepa.com get the data? Obviously sites out there are doing it – but after some extensive research – I can’t see how? As far as I can see:
eBay/amazon API’s give only current price data (although eBay give does 90-day price history)
Neither site allow you to store data, much less use it or present it like CamelCamelCamel
So what gives? My question is: