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iFixit wants to fix the soldering iron
(www.engadget.com)
This is a most excellent place for technology news and articles.
It's 80$ and doesn't include a battery. But the ifixit one does include a USB cable and a bevel tip (cone tips are bad)
So it's more like $26 plus $4 for pine USB cable, plus $6-11 for a ts100 bevel tip. $41 vs $80