ALL 4+ MONTHS SHOULD HAVE BEEN SOLD! It's 120 days in the contract, no?
Loans in BK are not sold in the mass sales; they are handled individually as the BK case progresses.
There appears to be a 30-day gap between the cut-off date for inclusion in the sale and the announcement of the results, so loans in the sale are likely to be 5+ months late, rather than 4+ months. This might be due to the length of time involved in soliciting bids and finalizng the sale, but more likely it relates to the requirement that Prosper give a 30-day notice to borrowers before it accelerates their loans.
My expectation is that loans that went 120+ days late after sometime in late November will not be sold this time around.