I see someone is selling heavily discounted "new" 2013 Mac Pros on eBay during the Black Friday Specials. They all seem to be the base model with processor upgrades and the option of upgrading the storage and memory. They are selling the 8 core for $3750. Apple retail price is $4999. I don't see anything about an Apple warranty, an Applecare option or a serial #. Someone with a shrink wrapper or worse?