The best place to search for a second hand NIC from Germany would be the classifieds ("Kleinanzeigen") in our forum:
http://www.amiga-news.de/forumCreate an account and post a thread with a title like that:
"S: [the item(s) you want to buy]"
("S:" stands for "Suche:", English equivalent would be "WTB:" or sth. like that).
A NIC should be no problem - as long as you're living in Germany ;-) If people are willing to trade with you probably depends on your location - we have the occasional dutch or czech guy trying to make a deal and they usually succeed.
