Kae'Yoss said:Is it really worth a dozen guardsment to get the stuff? Nah. Let them keep their stuff - untill they sell it to one of the local shops, for a low price. That shop will sell it for twice as much - and pay taxes to the royal treasury for it. Those adventurers will also buy stuff in my nation (doing wonders for the local economy) and probably blow lots of money on booze, beds and brothels. And who's getting taxes from those? Right!
Yup - this is how a sensible, free market sort of place like the Free City of Greyhawk runs it. 5% of retail value from shop tax on the wand of fireballs is much better than losing half the city guard while attempting to exercise 'eminent domain'.

I do like the 'treasure trove belongs to the State' confiscation idea for a Lawful Evil realm like the Great Kingdom or European Union, though.
I mean a fantasy European Union...