I don't quite get the last question, but if it's a repair place, you can assume that they won't usually be complete.
If you can land a repeat customer, though, it may be worth it to take a lower margin (Not losing money, though).
Old servers are hard to sell. Maybe you can sell a PSU or the drive caddies, but that would be about it for server-specific parts.
Of course, RAM and hard drives can be sold if they're tested and working.
I can't give you a value, because I don't know the completeness of the machines, how much time/labor you'll have into it, the Canadian currency rates, or how buyers in Canada are in volume/price.
Best of luck!
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