have been doing the ebay thing, acquiring several 'job lots' to sort as well as trying to replace those bits which have been eaten by the vacuum cleaner over the years!
I have found Heather Patey's PlaymoDB a fantastic resource for tracking down sets and parts
Welcome, welcome. You sound just like me, and I'll second that comment about PlaymoDB. I have just spent the best part of two days up in the loft with the spares I ordered before Christmas and didn't have time to do anything with!!! If you are wondering about the forum name, it's because I have a huge hidden stash of Playmobil in the loft (mostly job lots from EBay which used to have bits missing) of which my six year old son knows very little (he knows it's there, that's all!!!)
You'll find your passion for Playmobil becomes an out and out addiction now that you have joined Playmofriends. Have fun