There are not many at all, in fact, three of the tour fitters at Titleist Oceanside when asked this question by myself have said the numbers and performance are what is important vs. the price of the shaft.  That being said, I would imagine more expensive shafts might have minimal performance characteristics that only a Tour Pro might be able to utilize however for us mortals price is second to performance is my position!

Hope that helps!

This is a question with several different answers. Given that most, or generally, the general public are average or lower golfers, the answer would be that there is not a great amount of benefit at that level. That being the case, the above average golfers can find and gain a significant benefit from being properly fitted for their swing and all of it's components. There is no rhyme or reason at which handicap you determine you "need" any of these benefits, but I would say traditionally if you are around/near a handicap of 5 or lower, you may be interested in exploring the advantages a bit deeper. 

Thanks everyone for your comments. Some of you may already this, but this was news to me.

A typical fairway wood has a tip diameter of .335. This helps the club head to add height in the swing. A typical hybrid has a tip diameter of .370. This helps the tip of the shaft to remain strong. An expensive shaft with a tip diameter of .335 costs more to produce, based on the number of "wraps" of graphite material. A cheaper shaft will have a tendency to break over time, just above the driver or fairway woods head, due to less "wraps" (If you will).

Some club manufacturers cheat this, by creating a tip diameter of .350. With this number, they can use a cheaper shaft that remains strong, but without you knowing, actually robs you of any additional kick that club head may offer you.

Ask yourself this. When was the last time you ever bought a new driver for the shaft? I bet never, the shaft is just there. We always buy a new driver for the glossy paint and a new design of the club head itself. When really, the shaft is the most important part of your new driver.

Just in passing. I've decided to re-shaft my clubs with Aldila's NV. That shaft has been around for years, unlike any other shaft I have seen. There's a reason for that.

Today, I am thrilled to say my 5 Titleist 913 hybrids are all getting new shafts. The process begins. These are clubs I bought through eBay and all are still new, never hit. I have a guy who is doing the work for my. Thank you Brian. I will post a completed photo when the work is complete.