How much money that are puts down on the loan 10% to 20% & how quickly they want to close.    They more money a buyer puts down the more financial stable they are.  & that is a good sign they can close.  

It depends on the sellers situation. Many sellers are not in a rush to close, might want a rent back, etc.

It will depend on what the seller needs most. Quick closing or highest net if all buyers are well qualified financially.

The offer presenting the highest assurance of closing with the highest price and if the seller has urgency, quickest close time.

A clean offer with minimal contingencies; a good pre-approval letter; a cooperating broker who doesn't make the hairs on the back of my neck stand up.

It's not me, it is the sellers who decides the best offer. I just guide them.

The offers that match the Seller's written instructions in the listing regarding being "complete", amount of earnest money, proof of funds and/or pre-qualification.  Above that. Price and close of escrow date!