When buying used macbook pro 2010 do I need the cd? It seems to me that I shouldn't need the boot cds when buying a used macbook pro if it is upgraded to Yosemite, is this correct?
Yep, as long as it's running Mac OS X 10.7 "Lion" or later, that MacBook Pro won't require or even be able to make any use of the boot CDs. The reason being that Lion added the built-in Recovery partition, and many features in Recovery were previously only available on the boot disks.