As long as you act ethically and within the law, your broker won't care what you do.

You should always use the ethical approach.

In return you should have the decency to respect that you have a binding legal contract and that, assuming late payment fees are included, you have the decency to respect that contract without expecting any special treatment.  

As far as I know and absent instructions from the seller to the contrary, I believe that the requirement to present all offers is universal in the USA.Some of the other practices you're describing are abhorrent and most likely violate state law and NAR's Code of Ethics, which apply only to NAR members - but most of those COE guidelines will be reproduced in state law.Bribing an agent with Amazon gift cards? 

The fact that these things are making you question the ethics of wholesaling is encouraging. 

If pest remediation is needed, the Tenant shall comply with proper preparation for treatment and prevention.

There is no statutory holding period that qualifies a property for 1031 treatment. 

Ethics of what kind of world you're leaving your children.....I did not blame anyone I said it was my opinion.....but it is also the truth.If i could sell you ice in Antarctica and make a profit is it ethical to do so?

Lower price (maybe...I see plenty of overpriced off market deals).Cons:Chain of title and closing process can be (not always) shady, with multiple contracts, assignments, and/or changes of ownership.Less room for negotiation (most are cash only, no due diligence, take it or leave it, close next week).More downside financial risk - with no inspections or due diligence, you better know what exactly what you're getting into, and/or be able to weather the inevitable surprises.Less recourse - in many cases, you're dealing with unlicensed individuals who have no regulatory authority policing them or enforcing rules that protect the consumer.MLSPros:More info available up front.Clearer chain of title and cleaner closing process.Everything is negotiable (price, closing date, due diligence period, financing options, etc).Less downside risk with availability of inspections and process for resolving inspection deficiencies.More recourse - agents are licensed and should be following legal and ethical guidelines.Cons:More competition (if buying) - The MLS is arguably the single best way to market a property for sale, and ensure the maximum number of eyeballs can find it if they are looking.

These are professionals with additional training and a stricter code of ethics.