Civic Recycling in Calgary sells it by the box (1000 ft), I'm not sure what their pricing is, but they've usually got pretty good pricing on all things electical (new and used, cable of course is new).
I know the owner and he's a pretty straight shooter, so this is a bit of a plug, but they're probably worth a call.
You could try them.
http://www.civicrecycling.com/
403-236-9600
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