I tried to sell a MBP here and on Craigslist to no avail. New ones are coming soon, and I want to get the most out of this one before that happens. So I am left with eBay. Do you guys have any advice regarding avoiding scams and scammers? Buy It Now, PayPal, only ship to continental United States, ship with tracking & signature confirmation. photos of it both out and in the box right before it is shipped out... anything else?