Not seen one either.
I don't always get the Big Drop in Value argument and yes, it might happen on some of the guns from less well know makers so I know where people are coming from..but at £500 to £700 theres not a great lot to lose.. Any well known gun at sub £1000 has usually been shot to within an inch of its life, or been messed with and difficult to find in the spec you want.
The RA EOS at £799 look to be amazing value for money.