Hi everybody! I'm in the market for a used mac pro fron craigslist and I was wondering if there are any aspects to check to make sure the machine is in top shape? also do you guys think it's imposible to get a quad core system 2008 or newer without many upgrades for around $1200-$1400? I don't need the 8 cores or crazy RAM i mostly need the ability to instal a graphics card for multiple cinema displays.