Wembley #1 and #2, Paris FOS, and many other ticks, a little expensive, but you can buy tons of them:
[
www.getmetickets.net]
[
www.theonlineticketshop.com]
[
billet-spectacles.vivastreet.fr]
[
www.figaroscope.carrefourspectacles.com]
[
www.francebillet.com]
Search by Google or Yahoo and You'll find many more tickets.
There are some packages with train billets etc etc. all still available.
No european concert is sold out, some wouldn't never be, but they will sell many tickets and packages, they will make there money! Better than all the years before!!!