Update:

> "the PA Semi CPU [...] alone costs $500"
> http://amigatronics.wordpress.com/2011/04/08/exclusive-to-amigatronics-28-questions-and-28-answers-with-trevor-dickinson-a-eon/

"There were some minor logistical delays from Varisys set against the backdrop of rising PA-SEMI CPU (~100%) prices and other components. We decided to absorb the hardware price rises and not pass them on to consumers."
http://amigaworld.net/modules/newbb/viewtopic.php?topic_id=34437&forum=2&start=180#676781

I guess this should mean that the PA6T-1682M chip alone costs about 1000 USD (about 815 EUR currently) now.

Edit: It's 975 USD (750 EUR) according to this:
http://amigaworld.net/modules/newbb/viewtopic.php?topic_id=36670&forum=16&start=80#685248

Confirmed in Trevor's AmiWest 2012 presentation (direct link):

"I can purchase more PA6T CPUs. No problem. I can get as many as we want at 975 USD each. [...] On this last batch [...], I'm actually subsidizing. I'm eating 475 USD a machine."

[ Edited by Andreas_Wolf 03.11.2012 - 02:51 ]