In the interests of being a step above the other E-bay sellers of used equipment, I'm testing every device coming through the door. This is turning out to be an absolute necessity. The amount of issues I've found, most correctable, has definitely showed the value of this approach.
All on devices that were sold to me as Tested Good.
I hope my potential customer's see the value of this also.
And the real work of this operation:
custom cables, T1, and Switch to Switch.