I scored a full dev board off of eBay(*) for about USD$100 delivered to me -- about half of what it otherwise might have cost. Those certainly aren't cheap. But convenient.
The raw BT module itself is a more reasonable CAD$28 at DigiKey, and wouldn't need too much glue to get going -- the datasheet shows the necessary "glue" bits. If I get this one working, I might try a simplified design around the raw BT module later.
If I get this one working, I might try a simplified design around the raw BT module later. 
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