>>>http://en.wikipedia.org/wiki/Stirling_Hoard
>>>
>>>I can't recall ever hearing of a better example!
>>
>>and with a good chance of being tax free as well...
>
>In the UK treasure trove is split 50/50 with the landowner so I guess thats a sort of tax..

but also a motivation for the landowner to invite/allow searchers on their ground...