A few tips to quickly identify a scammer

Recently joined.
Few posts.
Paying higher then the value.
Will not go first.
Have few or no post outside of Marketplace.
Self-confident (A good scammer is self-confident and urgent to trade whit you).
Have a lot of evidence that he/se is legit
Use common sense.

This is the basic ways to spot a scammer hit me up if I forgot something important, I know I've done it. :3

Nice and you forgot reps

Yea but you should never trust anyone becuse of there rep or status(If they are RG Elite's and so on) how do you know its not a friend of them who gave them rep but negative -rep is a clear dont trade whit and even if they get -rep they may create a new account.

My formatting was messed up and I don't feel like retyping everything. All in all half these points are subjective but nice try.