Here is a collection of links that were very useful to my collecting:
The Imperial GunneryTHE site to check if your weapons are vintage or reproductions
The Armory of the Jawa'sA site to check if your weapons are vintage or reproductions
The Star Wars Collectors ArchiveA nice database on what's for sale
The Rebel Scum Photo ArchiveA nice database of foto's about collectables
Vintage Star Wars ToysA great collection of detailed photo's of action figures
The Dutch Star ConCheck here for the Dutch Star Wars happening of the year
Hollandse MarktenCheck here for yard sales, etc. in the Netherlands
Star Wars VerzamelaarA Dutch site about Star Wars collection
A Collectors Guide to BaggiesA site about Star Wars baggie figures
Galaxy ShopA Dutch for Star Wars (and other) collectables