I always forget to buy adapters before traveling and I end up over paying for them at the airport! I get mine from Amazon and they're super cheap and work well
I have had the same experience, mine always break. Better to invest in a good one and hopefully you won't lose it LOLThis is a GREAT point to mention!
I always try to have at least 2 plugs for each device (including adapters and a EU travel power strip). The worst case thing to happen is you get to a small Greek island, you run out of battery on your phone and then can't find (or the 1 power cord you have breaks). I have found that the low cost replacement chargers that you find in Greece sometimes do not work well (this is personal experience!)