I bought mine quite cheaply from TKMaxx(UK version of TJMaxx), a few years back. Sealed but the plastic top did not seem to fit very well, I had to click it into place myself, the round plastic neck bit. Cuir de Lancome does start out quite harsh and tanners yard like. Sometimes from mine I swear I get a BO like odour going on. Yet others compliment me on it.
The original wouldn't be available now unless perhaps ebay under vintage. The one which came out and everyone is raving about it a reformulated version(I cannot see them Lancome breaking the new banned ingredients rules). Was your sample a spray or dab? Perfumes can smell very different depending on how they are applied. I doubt Amazon sell fakes.