>>513879262
>So, should I scrape all that or should I concentrate on some other auction site?
It's good to have Dorotheum since their quality is good and their preservation is uncertain, but you could scrape every Dorotheum piece on mutualart and I really wouldn't have any way to make use of it for my particular project, it is the labeling which is most time-consuming, not necessarily the actual extraction.

From my perspective, if you could just label a few of your favorite pieces every week and share them here for our archive, that would provide more immediate value than just scraping everything. Perhaps you could concentrate on a particular artist that you like, creating a complete catalog of all their stuff posted on Dorotheum and sharing it in these threads.