A perfect block of briar (or even a near perfect one) would cost 3x one of Jack Howell's pipes by itself. Uncarved. Howell's briar, from what I have seen, isn't all that great. His carving looks masterful though.
There is no doubt that the blocks that are sold to make the most expensive, beautifully grained pipes are significantly more expensive than the ebauchon blocks used in many factory pipes. However, the difference in cost between the cheapest blocks and the most expensive are nowhere near the level you have suggested.
Let me share this excerpt from an email I received from the late Ken Barnes, who was well-known for his ability to pull straight grain from a block.
"Was it you Craig who was talking about the rarity of straight grain clean Canadians? If it was, here is an extract from a friend of mine who owns a briar saw mill and is a briar burl cutter.
Before I receive the top quality plateaux (i.e. super blocks) it is interesting to note how much briar needs to be cut to yield one super block of plateau.
This is a breakdown from a briar sawmill.
“we cut more or less from 90,000 to 120,000 kg a year of fresh briar and only 30% will be blocks for pipes (70% wood for fire); of these 30% of blocks yielded, 70% will be ebouchons for factory production (small blocks for making catalogue shapes – ‘series turning’) and 30% plateaux in 3 grading: the 30% plateaux yield is: TOP level I super 10%; II grade good 30%: III grade for sandblast 60%.
If I consider only the top level plateaux (10% of the total plateaux) 90% are for brandy (apple) and dublin shapes and free-style and perhaps only 10% for billiards and if the shank is long only a few blocks a year for a canadian. On the low grade you have more possibility to find a canadian and a billiard shape but the quality of the wood is not as nice as the first grade.”
So, that is how rare Super blocks are – costing me about $70 per piece landed in the UK – The seventy pieces that I have accumulated in the past year are gorgeous and I am due to receive another 10-20 blocks this week. (I ordered these in January!)
Ken"
So, $70 for the very rarest, finest, and necessarily largest blocks, due to the long shank of a Canadian. Even at double that $70 price, it's nowhere near $900-$1200 that you suggest. Looking at Manno Extra Extra grade plateau blocks from Rawkrafted, they are at most $65. Asking more for a "perfect" block is absurd. No one knows what flaws may lie within. That"perfect" block may end up a beautiful, but significantly less valuable sandblasted pipe.
Even if you have the very finest block, making the most of its potential is difficult. Cutting a block isn't like cutting a board. Unlike a tree trunk, which has largely predictable grain patterns which make maximizing its grain a relatively straightforward affair, briar grows in what is essentially a ball. The grain is not really straight. It's radial. A block may contain a beautiful straight grain pipe, but finding that pipe in that section of block takes time, experience, intuition, and skill.
It's what the pipemaker does with that block that creates the lion's share of the difference in value and price from a lesser pipe.