Reddit mentions of This Old Boat, Second Edition: Completely Revised and Expanded

Putting a bluebook value on boats is really difficult. The equipment and condition can vary so greatly from one boat to another that it would be impractical to group them all together.

In my experience, the best way to get a feel for the value of a boat is to look at a lot of boats. Check out many listings of boats that are in your target size/style, and go and check them out. Even take photos and make notes so it's easy to remember what features were with which boats. Eventually you will come across one that just seems to be a good value when compared to the others that you have seen. It's a bit more time consuming this way, but I feel that you'll get a better boat in the long run using this method.

The problem with surveys is that many surveyors just don't do a thorough job. I wouldn't pay for a survey for a boat until I was quite certain that it was a boat I was ready to purchase. And even still, for a boat of this price a survey may not be worth it. Grabbing a copy of This Old Boat by Don Casey may be worth far more to you than paying for a professional survey since you'll be able to use the information on many boats, and you'll learn a lot about your future boat in the process.

I know I'm not really giving you a solid answer but I'm not familiar with the market in Seattle, and as you've mentioned, location can make quite a difference in the listing/selling prices.

Good luck!

Get This Old Boat by Don Casey. It is an awesome resource. It'll walk you through diagnosing and fixing almost any problem you can find. There's also check lists for "critical systems" vs "probably needed systems" vs "this might be nice" (my wording, not his.)
Congrats on your new home! Good luck!

If you have a boat you need to get "Don Casey's: This old boat" It will explain this repair as well as all other you might need.

Avoid some carefully-selected answers (fibs) from the seller, buy a book or two on boat repair (shameless plug). You'll learn how to do basic inspections of the hull and other things to look out for. Then if you think that's the one, hire an inspector to look it over.

This is a great reference! https://www.amazon.com/gp/offer-listing/0071477942/ref=sr_1_4_olp?ie=UTF8&qid=1506370390&sr=8-4&keywords=don+casey

http://www.amazon.com/This-Old-Boat-Second-Edition/dp/0071477942

Go get yourself a copy of "This old boat" by Don Casey. They should be widely available secondhand.

He recommends installing a second maintenance bilge pump with a smaller hose, which mops up whatever the big one lets back down again when it turns off the power.

If you pull that off shoot me a message and I will email him all the pictures. Another thing I will suggest is a book called "This Old Boat" http://www.amazon.com/This-Old-Boat-Second-Completely/dp/0071477942 I have the first ed. but I am sure its all still there. It is a great reference on restoring all kinds of boats but especially older smaller sailboats.