Currently the data being displayed for the closed auctions on aquabid, after selecting "view 1 previous day", includes sales that have been sold before their close date. This allows a single sale to remain as a data point for multiple days. This is fine for viewing trends, but not valid for any serious data analysis
As of January 2018, aquabid's robots.txt only prevents automated browsing on the "/cgi-bin/auction/vfb.cgi" pages. Presumably, this is to avoid automated bid making.
This page's github.
Raw data is available publicly from a Firebase with instructions on the scraper's github.