I forgot to mention, my overall best find ever (I've no idea how I could forget this one).
In Legoland Billund they usually have this huuuuge box(not my pictures), where you can fill one of these, for like 600kr = approx. 110USD.
As you can see in the picture, the huge box mainly consists of clear plastic bags from old opened sets.
Here is the highligths of what I got:
All sealed bags for 7163 Republic Gunship (only thing missing was the sticker sheet, instruction booklet and the magnets)
About 1000 old grey 1x4 bricks
And ofcourse thousands of other bricks, mainly Harry Potter stuff.