Hello @Mike Savage,
I agree with everyone's comments so far.
As Realtor and investor in Portland I do see the value in listing the property with an agent. I have experience in this market and I can see that properties near 1 million are sitting longer even on the MLS. If you plan to price your home for 100K under the value you will probably get some action but I highly doubt you would want to do that.
Also, there are very few unrepresented buyers looking at properties at that price range. VERY few. So you would still be responsible for paying the buyer's agent commission of typically 3% when working with a FSBO. Your savings would only be 30K at this point and your property would not have the level of marketing that it needs to sell. Additionally, most listing agents pay for the advertising of their client's property and are willing to take that risk to get the home in front of the highest number of people possible.
In the Portland market it is not hard to sell homes under 400K FSBO. They still will not go for as much as properties listed and marketed through the MLS with an agent but they do still sell. That being said, your home is not worth under 400K. No matter what, unique homes in your price range are likely going to sit for a little bit, which will give you the time you need but it will still be sold for around the price range you are looking for.
I would be happy to give you a comp analysis of your property if I have a little more information. It is also best to actually see the home in order to give a proper analysis. I will shoot you a message.
Jacob Wathen