It is possible that the Selling Agent tried to lure you into a sale that would harm you, but I find it hard to believe.  

There are commercial products that can kill the root of the tree and not harm the rest of your yard. 

My ego does not want me to give it back and there by take a 3000 loss but my family and best friends say call it a day, return the money to the guy and suck it up as it is known that he is a scumbag who knows my address and may harm me or my family.Others ask me to stand my ground as he may hold the grudge either way.Need some expert, practical advise please.

My thoughts would be that at some point I might want to see the property so if we could limit the capital gains this would help but I am not sure of any harm this strategy would cause.When seeking out a tax professional do I need to focus on somebody in my state or are CPA's well versed enough to be able to operate over party lines.Lastly, are the only real advantages of using an LLC the benefit of limiting your liability to your business only.

No harm no foul.

@Kerry Hennessy there is no harm in putting an offer in as long as you get it for the right price.

Not much substance but I hope this is helpful! 

There's no harm in floating out the seller financing question, but it's probably unlikely.

It's a book of an intro with little substance.

On the other hand, I've heard of an investor that got roped into a project that was half done, with no permits.... they hung tarps in front of the windows and pulled long shifts, including getting an electrician to come work in the middle of the night... and got it done.... no harm no foul.