Perhaps you'll test by USPS 
With a little chance, you winn 
or without chance you pay 
I had a package delivered by USPS today, in fact, Jacques. I normally get things sent by Global Priority Mail - it's slightly cheaper than ordinary Airmail, and is
supposed to be quicker. But this package (my J&M antennæ, quick release braided fuel line, some ball end allen sockets) was posted on 17th February. 19 days!! In contrast the same friend posted me a package by ordinary airmail on 24th February, and it arrived on 1st March!!! GPM used to be 3-5 days, but I think that what's happening now is that because the £ is strong against the $, lots of people are having stuff sent from the US, and UK Customs have realised that there is money to be made, so are causing big backlogs. Previously, you would only be charged duty and VAT about 1 time in 5, and now it's 9 times in 10....
Incidentally, in the UK (and I expect France too) - anything costing over £18 (around €27) is liable for Duty and VAT, except if it's a gift, when the figure is £36 (around €54). Fair enough. But what I think is NOT fair, is how they add the postage to the value and charge Duty and VAT on it too!!

The we have to pay £12.50 (around €19) to the post office as a "clearance fee". If your shipment comes in two packages, then they charge TWO clearance fees...
Jim