I think it's fine, as long as it's disclosed sometime later when it sells.
Some of those items are ones I wouldn't restore, but the Cleveland poster probably wouldn't last if it wasn't worked on.
It may be scanner settings, but it's a bit concerning that the Wagner photo seems to have lost some contrast.
The boxes make me wonder if they were just rebuilt, or if they were also deacidified and conserved at the same time. Without that, the work done will eventually fail.
Most good conservators aren't cheap, just the right materials are costly.
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