En Primeur and Pre-Sell are all pre-order systems whereby you reserve a number of bottles of wine either while
it is still in the barrel (En Primeur) or in the bottles but not yet available to be sold (Pre-Sell). You pay
a deposit for a number of bottles, with the second payment being due at or around the time of the wine being
dispatched. All of these cases are offered as multiples of 12, unless otherwise stated on the website.