I Am Looking For A Dataset Of Datasets That Have Been Bought And Sold In My Attempt To Value Different Characteristics Of Data.

As the title says, I am trying to find a historical record of datasets that have been bought. Ideally, this dataset of datasets would include a transaction price and the list of variables that were included in the sold dataset.

I am hoping to learn something about how different characteristics of data are valued. However, I cannot seem to find any dataset (of datasets) out there that aligns with what I am searching for. Any help would be greatly appreciated!