The seller (Nortel bankrupcy judge) has dictated the terms. I think they have bundled ALL the patents together. The bottom, lowest bid so far is the $900mil seed bid from Google. The upper limit will probably be the price of buying a similarly patent rich company. IMO, That would be in the range of $10B or so.
Nortel went bankrupt. The funds from the patent sale will satisfy more senior level debt holders first. Depending on the amount of debt, there "might" be left over funds to divide among the common shareholders. The common shareholders get last.