Hi can someone please let me know how much the macbook below is worth in used condition as I have never bought one before and don't know if it is a good deal or not or if I should look elsewhere. The person is asking for 500 gbp for it The MacBook Pro "Core i5" 2.5 13-Inch (Mid-2012/USB 3.0) features a 22 nm "Ivy Bridge" 2.5 GHz Intel "Core i5" processor (3210M), with two independent processor "cores" on a single silicon chip, a 3 MB shared level 3 cache, 6 GB of 1600 MHz DDR3L SDRAM (PC3-12800) installed in pairs (two 2 GB modules), a 500 GB Serial ATA (5400 RPM) hard drive, an 8X DL "SuperDrive", an "integrated" Intel HD Graphics 4000 graphics processor that shares system memory, an integrated 720p FaceTime HD webcam, and an LED-backlit 13.3" widescreen TFT active-matrix "glossy" display (1280x800 native resolution). Connectivity includes AirPort Extreme (802.11a/b/g/n), Bluetooth 4.0, Gigabit Ethernet, a Firewire "800" port, two USB 3.0 ports, a "Thunderbolt" port, audio in/out, and an SDXC card slot. This model uses a "Unibody" aluminum case design -- milled from a single piece of aluminum -- and has a backlit keyboard, a "no button" glass "inertial" multi-touch trackpad, and a non-swappable battery design that provides an Apple estimated 7 hours of battery life. Compared to its predecessor, this model essentially is identical externally with the exception of the aforementioned USB 3.0 ports. Internally, however, it has a faster processor, architecture, graphics, and RAM.