I had a look around eBay, and just became the owner of Hexen 2 and it's mission pack ... It's bidding and takes a bit of time, but there's many copies on the different eBay sites.
Don't forget to check eBay.com as well as eBay.de and eBay.co.uk, they have different content of course.
Wouter Lamee
mailto:wouter@wouterlamee.nl
http://www.wouterlamee.nl