Hi Frank
Keep in mind that Eyetechs price is in British pounds not usd. £ 500 = $ 824. (EDIT: OK, I was way to late pointing that out! :-)
-----------------------------------------------------------------------
Anyway the Teron is not able to run OS4 and when you pretend to order it on their site it says G3-600mhz on the "view shopping cart" page.
So are you sure the 499,- is with a G4 (I doubt it)
