I should clarify because obvious there is quite a lot of raw 1928, 1934 $500 ad $1000 out there. I am talking about A) $5000 and $10000 denomination AND B) $500 and $1000 PRE 1928 I mainly stick to coins. I had a guy claim his dad had a 1922 $500 Gold Certificate but never saw it and was not too confident in this guy's integrity.
Sitting in SDB's and safes around the country. In earlier times fortunate people that had large sums of cash and not a lot of trust in banks(remember the bank failures in the 1930s) would put aside larger denomination notes. That quite frankly is the reason I have some today - because local people that owned them died off, their heirs found them and turned them into the bank - that called me to come get the notes.