From what I have seen, these modules tend to go in the $50 range or so...although I have seen them sell for $80+. I picked up two of these modules (
D1 and
G2) in two seperate auctions for $35 and $43. Figure $50 for each would make it $300...then figure another $50 or so for the remaining items...so I would say $350 (excluding your dungeon module pack cover). Using current exchange rates of Australian to US, that puts the amount you paid at $358. So, I think you are pretty much in the ballpark.