Priceless to whom ? How many hindsights are we really going to gain from that ? How many people are even going to benefit from it. No, how many will even hear about it or will effectively access this ?
We have tendency to consider that all knowledge is precious. That all information, especially from the past, should be treasured. It's sounds more anchored in a collector mindset that in any real assessment of the value of the discovery.
We can't save everything. We don't have to save everything.
As usual, we need to evaluate the cost vs the reward.
Now the hard part is to put a value on knowledge and potential, which I agree is very hard and controversial. But stating we must save things as soon as we discover it doesn't help.