Is it legal to store data history from a website?

Question

Law in IT

Let's say there is a site that gives out some data, such as prices or descriptions. I want to periodically collect this data and compare it with past values ​​yesterday, the day before yesterday, and so on. Is it legal for personal use? And will it be legal to provide access to third parties to this data? There is no mention of any hacking. Only data from open sources. Let's say even manually assembled, without parsing, and so on.

Answer 1

Formally, the site can determine in the license agreement the procedure for using their data, but in fact no one cares, prices as information are not subject to copyright.
The law does not separate automatic parsing and manual analysis, because it is impossible to distinguish between data collected in one way or another, i.e. if the site prohibits such analysis, then upon receipt of this data it will be impossible to fulfill this prohibition (to prove that you collected the data in this way) and the maximum that the data owner can do is to catch these automatic methods and block them.
So feel free to collect, analyze, share this data and so on... and be prepared that automatic parsers will come to you ;)