Ok, so its got over 5 times the resistance of copper, so its very poor for long runs. OTOH its mechanically self-supporting, given appropriate support at its terminations, but no-one in their right mind would use flat 8 wire phone cable in a self supporting application as it would be likely to start galloping in the breeze like the Tacoma Narrows bridge leading to early failure.
Take a picture of a magnet stuck to it, Screen grab the auction before it goes away and raise a dispute.