Amethyst Lalique

Hey everyone, Quick question, am I missing something about Amethyst by Lalique? I was going to purchase it and see that although on Lalique’s website it is 100$+, all other sites (Walmart, Fragrance Net etc) are retailing it for 20$/30$? Are they scams/non originals likely?

Also, new to perfume buying so what are legit perfume stores? Thanks all!