The homes value doesn;t change based on your credit profile. It sounds like they dropped the price ($100 Less), although if it's $100 and not $100,000 I don't know that I would consider that a price drop.
The real question is why did the financing fall through on the property the previous 3 times. It is my experience that properties do not sell for 1 of 2 reasons. The price or the property condition. The property has been under agreement 3 times so I am guessing the price is not the issue.
If the property condition is the issue with financing, 25% down won't eliminate those issues.
You need to find out why the other loans did not go forward...If they all fell apart because the buyers did not qualify, I would love to get an introduction. There is real value in having a lender you trust pre-approve potential buyers.