Fortunately, a German found it and turned it into the Polizei
Some people have all the luck.
But I may get lucky too. Back in WWII, German SS buried
caches of weapons around Brno, to be used by Germans once the Red Army 'liberates' the area. Didn't happen, as very quickly after Brno was liberated, Czechs force-marched all Germans except the anti-fascist ones to Austria in the course of the infamous Brno Death March. Brno was half German back then..
A friend of mine fell into one of these caches in 1980 or so .. and found a whole crate of 10 sniper rifles and a huge crate of rifle ammo. Was swimming in oil.. Some of his friends still have those rifles. There was also a rusted crate or badly preserved guns.
The area hasn't been developed since WWII, amazingly. It's entirely possible that some caches are still there, waiting to be found. I'm gonna check legislation how such finds are treated, and to whom the area belongs... but hopefully, if I find a crate of vintage machineguns buried there, the owner of the land will cut a deal with me. Or I'll just remove the stuff bit by bit.
The only problem is, it's just a couple of hundreds of square meters, and there's buildings on other sides. Fortunately, the area's wooded and unkempt, so some covert digging will be possible.
Even If it won't be possible to do it completely in the clear, turning in a few vintage weapons during a gun amnesty, which means they get legalized, and then selling them would be a neat source of additional funds.
Fortunately, the area wasn't fought over, so there won't be much unexploded ordonance. If there was.. one of my childhood friends is going to be an EOD specialist soon.
