Buy them... and take better pics

They are not AMD pieds (you can see a ring on male's neck)
They are not dominant pieds or arlequin since there is piedness also in the male's head.
They are not just pallids
It seems that feather structure is altered and they seem to display some kind of reddish colour in the wings feathers... but pics are not terrible !!!
From known combinations of mutations I would say that they look much like dilute grey green birds (look here: http://home.wanadoo.nl/psittaculaworld/ ... Dilute.htm), but a better pic would be great. Ask for their parents and for their housing conditions to be sure it is not some kind of illness.
Best regards
Recio