iMac 20" (mid 2007) desktop computer - full working order - £300 ono

Hi everyone. I'm looking to sell my 2007 iMac. Obviously it's been around for a while now but it's still in great condition, full working order and I've upgraded the memory and operating system over the years so it's still totally usable for normal day-to-day activities. It'd make a great first computer for a child/student or if you just wanted a machine for doing one or two things really well.

I've got all the original packaging; the only thing not original is the wireless Magic Trackpad, with which I replaced the original mouse a couple of years back. I've attached a photo of the actual computer but googling 2007 iMac will give you lots of other angles! 

Here's the tech specs:

Screen: 20"

Hard drive: 250GB

Memory: 3GB 667 Mhz DDR2 SDRAM (upgraded from 1GB)

OS version: 10.6.8 (Snow Leopard)

Graphics card: ATI Radeon HD 2400 XT with 128MB of GDDR3 SDRAM

Disc drive: 8x double-layer SuperDrive (DVD±R DL/DVD±RW/CD-RW)

Any other information you need please let me know. Happy to show it running if anyone wants to come round (near Harringay Sainsbury's) and see it in action!