In the meantime I don't remember I've seen FO3 anywhere before for 2.5€.
GOTY edition. I do have it on Steam already, but this price is tempting to grab it as backup… It's on Gamersgate:
http://www.gamersgate.com/DD-F3GOTYE…e-year-edition

Steam also started it's Holiday sale… I'm not done checking what they offer today. Maybe I'll just buy those few DLC I skipped before for Anno2070 that are -33%