I am looking for architectual prints of Giovanni Piranesi. First I
would like a listing of the various editions of his books, reprints
etc along with the date in which they were published. I would then
like different galleries or auction sites that are listing his prints.
Finally I am looking for some prints of his Prison series, the Carceri d'Innenzione.

If I may respectfully add this: You are requesting a huge amount of
information. It would take many hours of research to find everything
you are looking for. I doubt that any Google Answers Researcher would
do all that work for a share of $7.50. May I suggest that you adjust
the fee to an adequate level?

Regards,
Scriptor

I am new to this- what would be an acceptable level?

You may be interested in the following dealer's website, which
contains quite a lot of info about Piranesi, and offers some of his
prints for sale -    
http://www.michaelfinney.co.uk/Alison/catapt1.htm