I think 140 is probably an average price. The route I have flown them on most - CGN-STN has varied dramatically based on time of year and day of the week from 25-100ish Euros and that's only a 1 hour flight. I will say I'm excited about the prospect of flights to STN since as much as I like Easyjet, I hate Luton.
Anyone care to speculate which routes will be first? I'm hoping for STN, CGN and BGY to start.