I am looking to sell my Late 2012 27" iMac to go towards the purchase of a 5K iMac. Any suggestions on how much I should ask for it? Specs: Display: 27" Processor: 3.4 GHz Intel Core i7 (quad core) [Turbo boost up to 3.8 GHz] RAM: 16 GB 1600 MHz DDR3 Storage: 1TB Fusion Drive Graphics Card: NVIDIA GeForce GTX 680MX 2048 MB I'm thinking around $1,400 (USD). Am I too high? Too low?