It looks to be a pretty clean small boat, and with newer sails and rigging it could be worth a look if you can get the price down enough to offset the cost of a motor. One thing is to make sure you, the owner, and perhaps someone with trailer sailer experience puts the whole thing together prior to purchase. There are lots of small parts than can get lost, the rigging might be new, but not the right size, sails can look fine in the bag, but not fit the boat or furller.
The rudder is still an issue, not only is it just a flat board instead of a foil, I am not sure if corain is up to the task. I understand it is great as a surface for counters, but I do not know how resistant it is to bending and breaking. I agree with the previous post about fabricating a plywood/glass rudder to have in reserve. It would not be a hard or expensive project.