How to not buy a Fake.
Step 1. Buy from authorised retailer/seller only.
Step 2. Do not ignore step 1.
Step 3. You ignored step1 didn’t you, hoping to get a genuine product at a steal of a price.
Good luck with that.
Pictures don’t tell you anything, it is easy to grab a file photo from the net. Price doesn’t really tell you anything; I can sell a fake at $50, $100, $150, in fact any price less than the market price for an original and still pick up some suckers. In fact I can even sell it at market price as you won’t, be suspicious. Even feedback can lead you astray, as half the prior buyers don’t know they have bought a fake as they can’t compare to the original.
Go back to step 1.