No Due Diligence Period - Why?

[Evan Parker]

I may be missing something, but what is the reason to bite on a listing/property offering that explicitly states no diligence? 

From what I understand about having a due diligence period, even a few days worth, is to understand underlying tax implications, severe property issues invisible by just a quick walk through, or title issues etc. 

What is the benefit from an investor stand point of completely foregoing their option to due diligence just at the sellers request? Do any of you have any experience with going forward with a property and not doing any further digging into the state of the property at the sellers request? I see listings from time to time that explicitly state "NO DUE DILIGENCE" and it immediately raises flags for me. 

Any thoughts are welcomed.