I've came across many quasi-radars and others interesting numbers during my search through tousands of notes since 5 ou 6 years:
I got (and kept) an awful 20$ Birds AWC8666666, a F 5$ Birds GPP3333343, and a VF 10$ Birds ADX1000011. I've missed alot of nice 2 digits radars 20$ during my search in ATMs.
I missed by 26 notes a 20$ ladder in an ATM few months ago : AZZ0987680, and the next note to fall was ***681, ***682,...the numbers were going up!
But I never found a solid radar, nor a million numbered nore, nor any ladder...
And it should no be surprising: the odds to miss are much greater than an hit... :-/