I agree with Wayne Brooks.
Also, pre qualification and pre approval letters are not worth the paper they are written on.
A pre qualification letter just means that the person has spoken to a lender and TOLD them his income and debts. There is no verification required.
A pre approval letter goes one step further. As a minimum it means someone pulled their credit report. It can also mean there was some income verification. You have to read the letter to see what was done.
In either case nothing guarantees they can get a loan. Anyone can sabotage the financing simply by having their credit report pulled at a furniture store or two.
Best policy is to have a good relationship with a good lender.
Another point, if the buyer still wants the house add a sudden death clause to the purchase contract and realist it. If you get an accepted offer good for you. The first contract dies (sudden death). If the buyer gets financing approved simply remove the sudden death clause and close the deal.
Good luck!
