As a former resident of Israel I kinda know those people. They are there to do their 'hit' before settling back to 'normal' life. The brief they get is "sell". There are companies that specialise in getting young folk to the US and Europe to sell those product. They promise them the world and a silly salary. The reality is that the salary doesn't translate to the figures promised unless you actually sell like you life depends on it. So they do just that. The dead sea stuff is just one type of product, manufactured by nondescript factories and arguably not so 'dead sea'. There are others who go door to door selling 'made in china' oil paintings that they claim to be the artist of. Others sell gadgets in malls. Others sell whatever they sell. The techniques are similar and they are controlled by a few companies. There are even ads where they recruit based on having a US tourist visa alone (i.e., work illegaly until caught). This got so worst that the US embassy created a short film warning young Israelis of that scam, and the airports in London will hold any young Israeli coming in on suspicion of being a mall-stall fodder. Sorry for the guy on loosing $100 worth of chemicals that cost the seller about $4 to procure (I know this because, alas, my brother from the same mother has dabbled in this in the past). You've been had buyer of cosmetics. The best way to go about it, and a lesson to future cosmetic buyers as this poster, is that you buy if you initiate the purchase, not if it initiated upon you.