I'm hoping that they won't maintain the price at $40 for it, permanently, and that they will consider the possibility that there may be market elasticity and that they could earn more profit by selling more copies at a lower price. I often browse over games at Walmart, Target, and Meijer (local area superstore) and see one year old games still priced at $40 when they can be had for $20 online and wonder whether they are at all aware that their prices are a joke. I hope the same thing doesn't happen with Sins and Trinity. Perhaps it's time for Sins to drop to $10 (suck people in, let them like the game and want to purchase the expansions) and for Trinity to drop to $25.
At least those of us who play it online and hope for an influx of new online players sure would like to see increased sales.
<Edit> It looks like Sins itself is no longer available for purchase on Impulse; only Trinity.