In my opinion, ebay is the way to go. It really seems like a seller's market, especially with computers. I think auctioning will ensure you get the highest price possible for your powerbook. Just be careful of scammers...search the forums, I think there's a thread on ebay powerbook scams. The trick is to just be smart. At the very least, you can search ebay's completed listings for computers with the same specs as yours, to find what prices they went for.