ERA prepaid sim card availability ?

Are ERA prepaid sim cards readily available in Poland such as in the major airports, I know the refill cards are readily available throughout the country but should I buy the sim card before arriving in Poland. I will be staying for several weeks and the roaming rates are way too high.

Thank you

Era prepaid cards are available in some newstands and small food stores. Ask for ERA "pakiet startowy" (starter kit).
If you can't find - all have refills I'm sure - your option is finding ERA shop, most shopping centers have ERA outlet (I think)

You can buy a SIM card of any phone operator in Poland in almost any chain store or at a post office. Make sure that you have an valid Polish ID or passport as they usually check it (not sure why though).