How can you make an offer before actually seeing the property

[Kimberly N.]

I am seeing many post they are waiting on an accepted offer prior to actually seeing the property first hand. How can this be beneficial other than beating another investor to the punch if you will? I have looked at 2 places in particular that would have been disastrous had I purchased prior to seeing them, as the pictures only show the best parts of the homes. Do you make really low ball offers & pray for the best? I am also not understanding how you can back out of a deal after it's accepted & find these type issues. Are you offering earnest moneys with these offers? Can someone please elaborate on this as well?

Thank you!