I thought Lisbon was cheap as well, greatest cups of coffee I had for .50 euro.
We decided not to go to Lisbon because of the sheer amount of 'jumpers' (I don't know the proper term): people who will go to another company for E100/month more (probably because there is so much choice there). It's too hard to filter them out and we don't want them. We tried it for a bit but people coming to interviews with proposal letters from other companies in hand to get you to outbid is just not what we want. It's like cheating; you'll know they'll do it again.