Amazon is matching Best Buy ad. Just order season 4 because this is the cheapest price that i have seen for.
Season 1
http://www.amazon.com/Entourage-Complete-Season-Kevin-Connolly/dp/B0007QS324/ref=pd_bbs_sr_2?ie=UTF8&s=dvd&qid=1229886035&sr=8-2
Season 2...