The answer is simple. If you want to get a good deal on a car. Don't get a scion. They will only sell at or above MSRP. They will not let you haggle. Look elsewhere. There are tons of other car companies out there. The idea that Toyota has quality superior to everyone else is just a misconception no days as their quality has fallen in recent years now that they've been mass producing cars in larger numbers now than ever before. In reality, your just paying for the name.
And like I said. You live in Seattle after all. You need a more substantial car. If you MUST buy Japanese than I would strongly suggest that you look into Subaru. Subaru is a big seller in the pacific northwest. Probably because they offer the best AWD system in the market right now and it rains all the time over there. Subaru also has high ranking when it comes to crash worthiness.
If you want something with a low price tag as a new car consider the KIA RIO. I think it starts at $11,000 and it does everything the scion does for much less and on top of that it has a 100,000 mile 10 year warrantee in case anything should happen. The toy on the other hand only has a 36,000 warrantee.
Consider all your options first before considering a Scion. A car which is seriously over rated right now. If anything you can wait so many years for the coolness factor to cool off. Than you can haggle. Or buy used.
East-