Genuine Apple 100% working used “
13″ MacBook Pro Retina – LOGIC BOARD 2.8Ghz i7 / 8GB RAM – Late 2013. A1502 

CONDITION:
Used 100% OEM Original Apple Part Tested 100% Working, 
Fresh Pull From Fully Working Unit.
INCLUDES:
Logic Board Only

IDENTIFYING NUMBER:
Apple Part #: 661-8146
Printed Part #: 820-3476-A, 820-3536-A
EMC #: 2678
COMPATIBILITY:
13″ MacBook Pro Retina A1502
Late 2013 ME864LL/A 2.4 i5
Late 2013 ME866LL/A 2.6 i5
Late 2013 ME866LL/A 2.8 i7
Mid 2014 MGX72LL/A 2.6 i5
Mid 2014 MGX92LL/A 2.8 i5
Mid 2014 MGX92LL/A 3.0 i7