It is all about the Provenance. If you are in the world of art, classic rugs, or museum pieces, there is the risk of litigation over your work.
What we now know as Leonardo Da Vinci’s Salvator Mundi sold for a mere $126 in 1958 and in 2005 as a poorly over-painted piece. It was identified and restored before selling on 14 November 2017 for over $450,000,000! As you might expect, there were legal issues in its past. But a piece doesn’t need to be this expensive to be subject to competing claims and litigation.