Was supposed to close last Friday and the buyer had delivery of his furniture scheduled for that day.

It is the tenant's responsibility to set up a forwarding address not the landlords to find him they had better have set a forwarding address.If the letter comes back undeliverable, case closed, the landlord may take the funds.This is not the case according to subsection 5 (5) Except when otherwise provided by the terms of a written lease, any tenant who vacates or abandons the premises prior to the expiration of the term specified in the written lease, or any tenant who vacates or abandons premises which are the subject of a tenancy from week to week, month to month, quarter to quarter, or year to year, shall give at least 7 days' written notice by certified mail or personal delivery to the landlord prior to vacating or abandoning the premises which notice shall include the address where the tenant may be reached.

Many have their own grading equipment and contract for concrete delivery.

Network with service people, i.e. letter carrier, pool service person, lawn service person, newspaper delivery person, carpet cleaning people, plumbers, etc.

These platforms are simply a low cost alternative (internet) to connect capital to borrowers in the credit card/consumer lending industry...just a new delivery channel. 

(c) on delivery of deed or contract sum of balance down?

This Agreement shall survive the closing, execution and delivery of the General Warranty Deed, as agreed herein by the undersigned.I am not an attorney, so I would suggest running this by yours for approval before using it in a contract.

It is a retail business that does walk in and delivery of equipment and supplies.

Look into signing up for a Sherwin Williams PRO account - you get discounts on paint, supplies and free delivery.

In fact there is a significant disincentive as most AMC's require delivery of a report within 24 hours of a property being inspected.