I bought this table today. The base cracked -- see second photo -- but the price reflected that.
I have contacted a restorer refinisher I have used in the past, but have never had him make a repair.
If someone has some experience or an opinion on how this repair is done and its cost, I would appreciate your input. I hate not knowing the acceptable general process of a job, despite the fact I trust the skills and work of the refinisher.
Thanks 
Difficult to tell from the photos
I prefer to understand the story of how damage occurred to a piece in order to understand how to fix the damage. And I can't really tell what happened to cause that break from the photos.
Absent the story, I see two possibilities:
A: the table took a hard knock and broke, And, more importantly the pieces fit back together tightly with little effort. In this case it is basically a simple question of clean, glue, and clamp. With a bit of luck and/or skill it may be possible to make a "perfect" repair.
B: the table broke from internal change in the wood (shrinkage, warping or the like, possibly due to low humidity). In which case the break doesn't fit back together at all, or only under very significant force. This would be much harder to fix as the table would probably need to be disassembled and parts adjusted so that all the pieces fit back together properly. Not easy.
Again, though, there is a lack of diagnostic information here, so it is really hard to tell. The right answer could certainly be neither of the above.
The restorer is going to...
The restorer is going to repair the crack with glue. He assumed that someone tried to push the table but it got caught in the carpet depression and caused the break..
The end grain of the wood runs at a 45 degree \\\\ along the diameter of the table. He is slightly concerned if he tries to remove the reinforcement blocks from the inside on the table he might split more wood along the grain. This depends on the strength of the original glue. If removing the reinforcing blocks ends up an easy task. He is going to take the table apart and tighten the next two legs that are slightly loose.
If removing the blocks ends up being to risky he will glue the cracked joint and slide wedges into the loose neighboring leg joints.
We agreed that gluing and wedging is the most probable repair.
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