It seems to vary wildly by area and shop. I recently was looking into getting done, I was looking at some of the better shops in town, and I was looking at $4000 to $6000 and 6 months wait. Plus the car had to be assembled and have a running engine installed. The problem is there is a lot more money in collision repair than restoration, so a respray of an old car sits at the back of the line, or costs a ton of dough. I have painted some cars many years ago and decided to blow the dust off of my painting skills and do it myself. The 914 should be a fairly easy car to paint due to it's shape, and the new paint systems and spray guns are a whole lot better these days.
A good site for information on autobody stuff is autobodystore.com They have an excellent discusion board.
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Joe
74 Yellow 1.8L 914
72 Tangerine NoL 914
http://pages.sssnet.com/jkaull