In Norway you have to pay taxes (24%) on the items you buy in other countries if the price is over 100PLN... Thats why its often not worth buying things online here =(
Is there some kinde of limit like this in Poland too?
Yes. The limit is EUR 22 for purchases and EUR 44 for gifts.
But one of the joys of ebay is that you can almost always convince the seller to declare a value far lower than the true value of the item (EUR 19 is a good one) and thus get the item imported without being nailed for tax. I generally frown on people avoiding paying tax but as the government has already taken 41% of the cash my employer pays me before I can spend it, I tend to object to them then taking another 22% of everything I spend too. Paying 63% of your income in tax is one thing when you live in a country like Sweden where the health care, roads, government services, education, social services, social support, etc, etc are superb. But paying it in Poland, where pretty much everything the government is in any way involved is utterly sh!t, is a joke.