This is what happens when you confiscate and don't compensate the land owners for ancient stuff found on their property. If your only choice is to lose your shit, or sell the stuff and bury the place, then you are going to pick the latter. If you incentivize people to report archaeological findings, then you are going to preserve them. The only country which seems to know this is the UK with the PAS which compensates people who find treasure the government wants. (The PAS and this argument has nothing to do with foreign looted artifacts, just to push back against some stupid fool who starts talking about irrelevant shit.)