From Australia, that does seem cheap, as here the cost is around $700 outright.
But there is no point in buying it outright, as it costs $59 per month for 2 GB of bandwidth including $700 worth of calls etc.
And that is with you bringing your own phone.
But without paying a cent more, you get a Streak, if you want one.
And there is only one Telco dealing in plans for Streak. So they kind of have the situation sown up.
So, to buy a Streak at any price outright, is very foolish here, as it will then still cost you $59 per month, anyway.