2441 Views 3 Replies Latest reply: Jul 12, 2010 7:25 AM by rkaufmann87
It sounds like you wiped your HD clean so now the flashing question mark is letting you know the system is looking for an operating system. So yes perform an install with the disc that came with the computer and that will get it back to the state it was in when you bought it.
If you need help doing the install look on page 48 of the manual. Just in case you don't have it any longer here is the link:
When you refer to the Mac store I'm assuming you are referring to an Apple reseller. The reason I bring that up is Apple Stores do not accept trade in's nor will they buy back used machines and I doubt they would tell you what yours is worth. You can check on Ebay and Craigslist to get a general idea though.