It seems a rather sinister move, given that Greece is getting ripe for a coup d'état. Dark days are ahead.
One thought, if Greece falls to a military dictatorship, will the EU kick it out because it fails the 'democracy test'?
Update, Richard North has in the comments kindly added important information:
The report is based on a miss-translation - the original refers to an upgrade of the existing fleet, purchased by the Greeks in a deal negotiated in 2001.
No prices were mentioned in the original report - just letters of intent. The work has not been done, with the options of basic refurbishment and capability enhancement.
This version of the Abrams, with a fuel-hungry gas turbine, would in any event hardly be suitable for civil disorder/coups ... they would run out of fuel mid-morning, just idling in Independence Square.