Prices based on
www.ottobot.info's price list.
Export your collection as csv from the Magic The Gathering Online client and upload for pricing.
To do this, go to the Collections tab in the MTGO client, select the Expert (list) View
(it's a little button at the upper right of the cards list, very easy to miss), right-click in the list
and click the Select All option, right-click again and click the Export as CSV option.
Check out the
Decklist Pricer and
Stats