Well in general there is nothing wrong with Vesalia, but when it comes to PPC cards...well they are usually out of stock so Vesalia has to order them from DCE. DCE surely will not make batches of 2 or 3 cards. This means they have to order quite some cards from DCE and PAY them.
You can sure imagine that it is not wise to buy 10 or 20 cards and have only one order, so you don`t know if you will sell the other cards in a reasonable time, if ever.
So it`s logical that they wait till they have enough orders to make sure they can sell about 70-80 % of the batch DCE makes right away.
Vesalia although the largest Amigahardwaredistributor is a small company and they sure can not affort to spent 5000 EUR and more just like this.
Takeing the money while not haveing the cards at hand is indeed questionable (if they really are out of stock right now).
I talked with Mr. Does on the phone some months back when I was at a similar situation, haveing payed for a not yet ready G-Rex4000T (he went to DCE personally to see that I get my card). We talked quite some time and my impression was that they are haveing a really hard time with the amigamarket practically dead, so maybe you can give them even a little bit more credit then usual.