yeah aws other have said that aint cheap at all , i can build systems starting at just £180-£200 but they are very budget as for that system well you could build it for at least £600 maximum at the current exchange rate £600 is around $1200
if theyre so expensive, then maybe you should have someone in North America from Computerforums.org build it for you and shipp it to you, it would definitely be alot cheaper and customized then alienware's computers.