Sorry to hear about your friend’s husband. It’s nice of you to help out. Do you know the year of the chassis? Based on some of the details like the windscreen pillars, it looks like a ’96-’99 car, but I can’t read the digit between the 9 and the S on the VIN plate (if the VIN convention is the same as mine, the two numbers before the SEI denote the chassis year).
One thing that does seem a little odd is that the VIN contains the string SEI not SEIW. Westfield used to offer two different chassis: the SEI commonly referred to as the narrow body and the SEIW known as the wide body. The latter offered more interior room and eventually became the only option. Given your VIN, I would ordinarily assume that you have a narrow body, but I had heard that Bob Yarwood (the US distributor at the time) only imported the SEIW. As with any small manufacturer, exceptions are the rule when it comes to these kind of things so the VIN string could be a variable. I am happy to take some measurements from my car so you can determine which version you have.
Assuming that it is a stock engine as supplied by Yarwood, then you probably have a 1700cc crossflow with stock head and a Kent 234 cam. He claimed 145hp for that configuration, but 115-120hp is closer to the mark. Not the fastest thing in the world (R&T clocked that spec from 0-60mph in 6.1 seconds) but it sounds fantastic at full throttle!
As for price… Very hard to say. Assuming it is a ’96, Yarwood sold that spec new for about $25k. I’ve seen a couple like yours go for mid teens over the last year, but also one that was under $10k (someone got a deal). It’s really a function of how quickly you want to sell it, and timing it right – a little tougher in the current economy.
-John