I'm just learning pandas as well but I think it is the right tool for the job. I am using django-pandas so I can do easy ORM stuff. If I were to sketch out your use case:

Create a object/class called

    AuctionResult
     - some datetime
     - value

Then you'd query it qs = AuctionResult.objects.all()

then you load it into a pandas dataframe:

df = read_frame(qs)

After that you can do all sorts of the fun stuff I imagine.