Thoughts on a deal we just missed

[Kyle Eckert]

We looked at a 2-family flat in Saint Louis today.  Price was $90k in an up and coming part of town.  Bottom floor has a long term tenant paying $550/month, top floor needed finishing, a small deck and a small kitchen, prolly rent for $550 as well.  It's monsoon season here, so the basement had water coming in on all 4 sides through the limestone foundation, creating a small mold problem coming through the Drylok.  However the air was dry, so I found that reassuring.

The mold and moisture in the basement was not included in the provided disclosure.

My realtor just told me that a contract was accepted on the place, 2 hrs after we looked at it.

My thoughts:  Its a good price, and even at asking the cashflow works and provides a $250+ monthly income.  If the competing offer was made blind based on calcs and disclosures, what are the chances that the moisture and mold will scare them off?

Should I put in a back-up offer at asking, just in case?