540
xkcd #2895: Treasure Chests
(imgs.xkcd.com)
A community for a webcomic of romance, sarcasm, math, and language.
https://explainxkcd.com/2895
I love the care and depth that goes into these explanations.
Only prepare one chest and film it being burried three times.
That way you are only out $1000 and they'll keep searching for the other 2 (non existent) chests if/when they find the chest.
No, no, people will give up if it's just one. You need to do two chests, marked #1 and #3. Film a #2 being buried also, but dig it up immediately.