It is certainly worth consideration. There are now lots of good, reputable brokers both in Japan and here in North America. Parts, emissions and other regulations means that for many in Japan it is cheaper to move onto a newer vehicle then keep an old one. My brother recently imported, a Nissan mind you, but I have gotten to know the brokers, they take it seriously and make trips themselves as well as have good solid people working with them over there. I will consider buying Japanese next time. The cost is one very key benefit.
Check out their website -
www.importconcern.ca , click on the link in the top banner called "auction source", on that page is a funny looking link
https://bzl.cis6200.jp/e/, enter the log in ID S16091 and you can start browsing Japanese stock - 5 is the best condition, R is repair (which can mean anything from salvage to simple repaint. Figure $2k or so to get it into your neighborhood. Not suggesting you use them as you are in Washington but it gives you an idea as to how much cheaper they are there.
EDIT - in the search area, select "Imported cars/Others" and that will bring up a drop down menu of other manufacturers.
DOUBLE EDIT - Crap, there are actually no porsches on this right now. Seriously, I have checked this many times before and always some Porsche. Sorry to waste time. Check back cuz there are some real good deals. But bottom line - don't ignore Japan.
Hope that helps.
Bjorn