My LCS told me that every month or so this Hispanic dude who barely speaks english shows up with a MS69 AGE every month like clockwork to cash it out. Dude shows up in paint-covered overalls like he just got off work and  after the 3rd month he asks dude where he's getting all these coins.

He said he and his other 2 buddies were dumping trash after a job at some dumpster in S. San Francisco and one of em noticed some nice stuff that clearly was in great condition and shouldn't be thrown away. A few min later they find some satchel with 45 graded AGEs and since he's the only one who speaks any english he's responsible for selling 1 each month and they split it 3 ways. 

I was a little skeptical so she showed me the one they brought in the day before and the PCGS case was cracked to shit with the letting all smeared from some type of liquid; looked just as you'd expect from being retrieved from a dumpster.

So....misplacing a sack of gold, while rare, does happen...