It is so hard to say what something is worth without seeing it but $3000 seems fair from what I have seen out there. I usually just for the heck of it walk around the swap meets to see what a guy can buy and most any complete car of that age is going to bring over that, at least around here.
What can you expect? A HUGE education. But with the internet, it is SOOOO much easier than it once was. You can get all your answer here. And there is only two differences from building that car or building a model on your dining room table, that would be time and money. You CAN do it, and you will be very happy with yourself when you drive it for the first time.