You a bidding on a gently used Apple Macbook model A1278 with 500 GB Hard Drive and Power Supply.  Examine the pictures carefully, there are 2 vertical lines on the display.  This Macbook has been in storage for awhile, The data files on the hard drive have been wiped but "Mac OS" is still there to be installed.  Press "Option + R" when powering on to re-setup Mac OS. Detail specs can be found here https://support.apple.com/kb/SP583?locale=en_US