English Heritage says there have been a number of incidents of people illegally using metal detectors and taking artefacts from land at properties it owns in Wiltshire.
It's thought most are searching for Iron Age artefacts.
More top news
eBay is celebrating 20 years of buying and selling this month. But, it began as a hobby. Its first sale was a broken laser pointer pen.
Thursday's weather for the east of the region
Thursday's weather for the west of the region