Well, I sometimes find Partworks at Charity shops, albeit practically or fully complete. A decade ago, I picked up Orbis' Home Computer Course, with only one volume absent. I recently got that volume, thus completing it. Or a couple of years ago, I found at the local Salvation Army here in Australia, a practically complete set of the Star Trek Fact Files, with many of the issues not even taken out of their plastic wrappings, and a bonus Star Trek art book. That I got for $10AU (it was $15AU, but the proprietors there decided to give me a discount). And just recently, I obtained the first 30 issues of the Ultimate Real Robots series, with a practically complete and operational Cybot, and a Box full of spare parts for $20AU. Is it me or is Partworks a keen find at the Op Shops here?