I did another deal, 12 years ago, that actually was no money down, but it was unusual. I had been renting 4000 sq ft of commercial space from a landlord for 15 years. He decided he wanted to sell the 4 unit building and I was the perfect buyer. Except, I had no money for a down payment.
The seller wanted to hold paper so he did not get hit with all the capital gains in one year. Since he knew my reputation for always paying on time for the past 15 years, he agreed to $175k, zero down, 6.5% for 10 years. In return I agreed that I would repaint the building and do some neglected maintenance over the next two years, increasing the value of the building. Basically I promised to put in some sweat equity after the purchase.
He benefited by not needing to do the repairs before putting it on he market (about 10k) and not having to pay a realtor (8k). All it cost me at settlement was transfer taxes and title insurance.
Of course the only reason this worked was because I was his tenant for 15 years and he knew I was worth the risk.