If you live within the EU, there will be no customs charges.
Here in Norway, where we are not in the EU, we have a limit of 200 NOK or roughly €24/£20. Anything under that (excluding the shipping fee) is free of customs charges. Anything over (201 NOK + shipping) will be charged with a 25% import tax + handling fees.
So, if you live outside of the EU, I would look up the current import laws in your country. Here, a $52 packet would attract a ~25 dollar import tax/handling surcharge, making the final price $77. Also a reason why I didnt order the boxed version.