All this talk of equipment value, I'll offer a different perspective if I may...
Who care's what it is valued at with or without depreciation or what market / resale value is - surely the only true factor is the cost saving it represents? That is to say, if we did not have this equipment, what would we have to pay for it? Perhaps $70, 100 or more - I don't know, but it's $X of money we now do not have to spend for new equipment, as such, the savings it represents is a higher value than anything it could be valued at or sell for.
The real question for me isn't what it's valued at today, but rather how much of it is usable and what does that represent as $dollars saved (I assume all is still usable given it has not been used and remains in storage the whole time, may require some calibration or maintenance but perhaps that's it). Therefore the answer is ~$70m + CPI, give or take, is the value of the equipment for Vector, no need to stress about valuations as the savings value has already been realised through the acquisition.
My 2 cents only, hope everyone is enjoying the wait