That's true. An advice for those who want to collect Singapore Bird and Ship Series to stop before 10,000 SGD. 1,000 SGD will be just right.
Since 10,000 SGD were produced very much lesser than other denomination, it is unfortunate that in both series, they do not have a 555555. Bird Series only have one solid number A/1 111111 while the Ship series up to AA 222222. In the case of Portrait Series, it is up to OAA 444444. There is no OAA 555555. Just for your information, I have seen both the AA 222222 and A/1 111111 in real note. A few month back, AA222222 appeared and I have a chance to purchase it. The price tag is $40,000 SGD. More than 10 years ago, when it appear, it was at $20,000 SGD. 18 years ago, A/1 111111 was sold by my dealer friend at only $11,000 SGD.
With it's current highest face value, solid numbers $10,000 SGD also does not come cheap. It is not for everyday collectors but for professional and specialized collectors / investors. At this moment, I am just happy with $1000 SGD solid numbers.