This person responded to a craigslist ad asking me to hold an item and that they would pay extra for me to hold it.  In what world would someone agree to pay EXTRA for something off craigslist when buying it new would be close to the same price?  DON'T GIVE THIS PERSON FOR INFORMATION.  Look at craigslist and their descriptions of types of scams for more information regarding people who try to do this stuff.