He Who Hesitates...

F. emails on the fixer-upper first thing on Wednesday morning. They have already accepted an offer. What??!!! But the selling agent tells her they would welcome back-up offers. In the meantime, F. has tracked down the pest report and owner disclosures from the last time the house sold, in 2005. The owner says outright that in heavy rain there is water under the house, checks yes on the boxes asking about water, movement, and mentions noisy neighbors (?). Many of the items in the pest report have been visibly dealt with in the interim since 2005. I am ready to walk away, but the Husband asks if we can put in a backup offer. I know it's his love of square footage talking, but I crumble. It's only a backup offer, what are the chances?