@Matthew PaulIt’s my understanding also that due to the volatility in lumber prices suppliers aren’t locking in the bid until seven days prior to delivery.

Put the notice in writing and send one copy by registered mail with proof of delivery.

Commonly, the terms of a LOI are the address and general description of the property, the purchase price, the down payment (if a loan will be used), seller finance terms (if any), the title and escrow company, the earnest deposit amount, the due diligence period, the closing period, any extension that are allowed (paid for or not), language to address the POHs (if any), commissions, 1031 exchange (if any), timing for delivery of the PSA upon agreement by both parties, and expiration of the LOI.  

Though builders continue to see strong buyer traffic, recent increases for material costs and delivery times, particularly for softwood lumber, have depressed builder sentiment this month.

I am currently a FedEx delivery driver and I am wanting to get into real estate investing.

I once had tenants with a broken refrigerator that could not be bothered to respond on accepting delivery.

What is the best delivery?

You could swap out whatever the lock is with a pin pad and it could be as simple as a simple 4 digit code that every apartment shares and they can provide the code in the delivery instructions on Amazon.

Could he not have ordered a pizza delivery?

Are there any smaller suppliers in the Philadelphia area or Wilmington, DE area that don't sell out of these immediately upon delivery?