Seems like there were a lot of Mac Pro purchases and returns. Doesn't bode well for the Mac Pro.
Nope - Most early refurbs like this are Loaners, Internal testing devices and Demo kit. They get stripped down and tested and put in new cases. Over the years Mac Pro's Appear early like this then disappear as they are sold and a few years down the line you may get some faulty returns that have been refurbed.
iPhones are faulty come with a new battery and shell and often a new screen.