A former RAF station - complete with high-security fence, underground bunker and a helipad - has been put up for sale on eBay for £2.5m.
The Neatishead radar base in Norfolk opened in 1941 and played an important role in monitoring Britain's skies during the Second World War and the Cold War.
The 25-acre site was decommissioned in 2006, and sold to a private company.
It's been rarely used since, and has been on the market for some time.
There are 16 buildings on the site, including former radar rooms, tennis and squash courts, station headquarters and the old officers' mess.
The RAF still carries out communication work for aircraft on a small part of the site.
That work would continue, alongside the RAF Air Defence Radar Museum, which was established on the air base 14 years ago.
The page has attracted more than 5,000 hits so far - but no offers have been made.
Bidding ends on Friday 8th February.