I do not see any risks ... but why you should pay them in advance if they do not deliver? I have had many items shipped to European boutiques for me to try but if I would have paid for them it would have been somewhat hard to decline - yes, there are differences within Europe, too.
I know in the US it's again somewhat different. There, I have been asked to pre-pay to order. I then tell them to their frustration if I do it this way I can better do it online, and as there no substantial gifts in the US as well as no cash refund I don't see why I need boutiques in the US at all other than check by for a coffee. Okay, there's a nice SA in San Diego where I bought sth but w/o prepayment.
Back to you: I would check online what's available and - as you are in Europe - check any boutique you like to get hold of it. Maybe you have to wait 1-2 weeks if they need to ship it internally ... they have a few regions within Richemont within Europe and the stock varies.