Dave
You are right. Congrats on your 666. I used to hesistate when I acquire my first three digits solid 555 from Djbouti. It may not be my usual solids with 6 digits serial numbers, but I do need the varieties including French and French printed notes in my collection. I have since accepted that and also added other numbers such as 777, 888, 999. I believe most solid numbers collectors neglect collecting 3 digits solids. And also sellers do not consider them solid too. Fortunately, sellers do not charge a premium on these 3 digits solids notes. Anyway, we just collect what we like to see in our collection. If everyone collect the same style or same type of notes, our collection will end up duplicating others' collections. It's not unique anymore.