Looking on Ebay it is selling for around £60 to £85 excluding postage. So you are looking at around £50 minimum after fees and postage hopefully.

This build will do the job nicely:

http://www.ebuyer.com/product/134749

http://www.ebuyer.com/product/151054

http://www.ebuyer.com/product/114728

Total: £80.72