It seems odd that some sellers reserve the right to a sum of x1.5 at PayPal to cover possible additional postage fees etc.. I don't think any one actually excercises this right, but e.g. when buying worth 200e and the shipping fee is, say 15e, the charged 330e would basically mean that you accept a shipping cost of 130e. The reserved extra sum should at the very highest be equivalent to the next shipping fee threshold, not exceed it. Doesn't sound right to me, one should know in advance before the decision of purchasing, and quotes exist in order to confirm the sum beforehand.
Comments
If goods are €200 and the store's shipping charge is €15, you shouldn't be paying anything more than €215.
The only caveat I would add is that the seller is not responsible for import VAT/fees/charges unless those are included on the invoice.