Good answers below. Really all answers are correct because there is so much variability from one builder to another. In the end, the price a builder will accept depends on how much cost he has invested in the property, and how much supply he has relative to how quickly his homes currently appear to be selling. Many builders are more rigid in their pricing than resale home owners.
However, a builder will reduce his price--even sell at a loss--if he has to. There had been a whole lot of selling at a loss in recent years, with a large number of builders even going bankrupt. That's not happening so much anymore, but home prices are still historically low.
Don't expect that to continue forever, though. The latest home price reports published in the Portland Business Journal and The Oregonian showed sold home prices for the Portland metro area (including West Linn) rising for the first time in years, and showed a rising number of both closed sales and pending sales. This, combined with historically low interest rates, means that this summer may be the best time to buy a home for a long time to come.
Best of Luck!