You might want to have a look on German ebay for Falcons.
I'd think that Falcons were (and are) more common in Germany than in any other country.
Even when they say they won't ship abroad, you can always send them a nice message to persuade them to do so anyway.
Here's one, less than a day to go:
http://tinyurl.com/578jpr
Ok, it's more than £150 already, but it has 14MB RAM, a 2.1GB internal HD and seems to be in very fine condition.