Why did the hikers report their find?
They could have said to the museum “hey, would you like to buy some old coins to display?”
Europeans know their laws.
Authorities would be notified had they tried to sell any.........
Because it's likely the Czech Republic has a similar law as the U.K., that any treasure found must be reported to the local finds officer, or face arrest. The Coroner then holds an inquest to determine if it is treasure or not. If determined to be treasure, it will be reported to The Portable Antiquities Scheme (PAS) and is offered to museums for acquisition. Museums are given a limited time to raise funds to acquire the treasure at a price set by the Treasure Valuation Committee. If the treasure is purchased by a museum, a fair market value reward is provided to the finder. The finder must split the money with the land owner the treasure was found on.