Hey! So I want to sell my 15" MBP (Mid 2012) with high-res anti-glare display. Specs: CPU: i7 2.6 GHz RAM: 8 GB GPU: NVIDIA GeForce GT 650M (1 GB VRAM) SSD: Samsung 840 EVO 512 GB HDD: WD Blue 1 TB Battery: 94 % after 150 cycles + external SuperDrive It has a few scratches on the corner of the lid bump at the front and one missing screw underneath. And no warranty left. However, the motherboard has been replaced in June. 1) What would you think is the value of this MBP? 2) I'm considering swapping the 512 GB SSD with an Samsung 840 PRO with 256 GB on my gaming PC. Do you think it would affect the price heavily? 3) Would you recommend replacing one screw for about 25 bucks (that'd be iFixit's price for a set of screws here)?