I think you might be making reference to buying on Amazon from a vendor that Amazon is not fulfilling the order for. Certainly Amazon themselves are legit on the things they sell directly; you don't get to be a billionaire by scamming (unless you are a politician).
Check the vendor's ratings and feedback. Amazon polices them pretty closely so if any vendor is not shipping things, or is advertising falsely, they clean that up pretty quickly. I don't think you have much to worry about.
Amazon is 100% real, dont worry, i have ordered several stuff from there
and i got them in just under 2-3 days, but yes you can sue if you do get scammed which
is a 0.20% chance. Most likely will never happen.
If you get scammed you can alway sue, but people in my family have worked with amazon and we shop there ALL THE TIME!!
I assure you they're great and NOT SCAMMERS!!!!!!!
I shop on Amazon its legit