The GH1 hacked camera created quite a buzz, but fell off when newer units were shipped with 'unhackable' firmware. Shortly after, the GH2 was released. Not long ago an announcement was made about hacking those 'unhackable' GH1 cameras. This puts the GH1 back in the spotlight as a very inexpensive quality interchangeable lens video and photography camera, cheaper than some point and shoots. There was an earlier article posted on here, and many opted to go for the GH1 route. If you haven't already, Vimeo member Michael Eggert walks you through a how-to mod your GH1 cameras in this two part video tutorial.
If you're still thinking about the discontinued GH1 cameras as a backup
a few bodies still remain, your best bet is to check out the auctions. They're disappearing elsewhere.