Dawn of War with 2 expansions is currently £9.99 online at Zavvi or £10 instore.http://www.zavvi.co.uk/dawn+of+war-Dawn-Of-War-Anthology/732792/q.r10.1/p.jsf
Dawn Of War
Dawn Of War Winter Assault
Dawn Of War Dark Crusade
Note: You might want to wait for Dawn OF War: The Complete Collection. However, that's a lot more pricey at the moment. Also, its not sure whether there is going to be another expansion - although Complete does have a ring of finality to it.