I would have the consignment dealer return your deposit immediately. That would have the dealer do a last ditch effort to make the deal go through for their sales commission. If the seller won't budge, go on to look for one that will.
If NADA won't buy it, nothing will, IMHO. Some stubborn sellers are as some are suggesting here that the unit should be $15K higher. Balderdash. Low-Retail, minus the cost of the stuff needing replacing will buy it, since that is all any bank will loan on it - NADA. Tell the seller that too.
