What's left unsaid is whether your client is walking away with 100% of the purchase price, or carrying paper and what's the collateral.  I tell clients not to expect anything beyond the down payment; even buyers with the best intentions, know a good bankruptcy lawyer.  

I am helping some young friends in Ukraine who want to start a very small business.  This weekend I emailed them what I tell everyone here:  80% of small businesses fail, unless they are restaurants, in which case 90% fail, unless they have a liquor license, so that only 70% fail.