Bad idea: buy 100 HDDs and try to recover data from them

For a few years I’m fighting with spending some $$$ on a lot of damaged HDDs.
The idea is that in a lot of say 100 HDDs there will be some that will be detectable by BIOS/OS and some data should be recoverable from them. Interesting to see what they could hide
Maybe a good idea for YouTube series?
That's it for this post, thanks for reading!