How to buy off MLS in under 24 hours

[Jordan Messick]

I am newer to real estate investing and am building up my network to try and find off market deals. Until then, I am trying to purchase through keeping a close eye on the MLS. The problem is every good deal is under contract in under 12-24 hours for my area - Wilmington, NC. I walked a property today and by the time I ran my calculations on it, it was already under contract after being listed for <16 hours. How do you experienced investors recommend getting a property under contract with this issue? Do you just make an offer sight unseen with a contingency to give you a way out? Most properties I am looking at are <$150,000 that would fit the BRRR or Fix and Flip model.

Second question, how would you recommend making multiple offers in these situations?  I want to go in with a low cash offer, decent conventional bank loan offer, and higher seller finance offer.  Do you advise having my real estate agent verbally make these to the seller and then we put whichever in writing they prefer?  

Thanks for any input!