Morning gents, well - my own opinion is that all of the above statements are true someway, to some people:
the numbers '4' and '7' are generally considered inauspicious to most ethnic chinese races due to the connotations from the chinese language or dialect pronunciation -- because they reference inauspicious events. I'm no expert in this regard, so if anyone else can elaborate more accurately on this feel free to do so. conversely '8' and '9' are generally as very good numbers, and '6' too in Mandarin/putonghua and for example, the hokkien/fujian dialect. I am not very hung up about this, only that if such numbers are accessible, why not ? To that end, it was fairly easy to procure '9' and '89' for two of the limiteds I have.
A lot depends on how fair you go - a boutique sales staff was telling me about '20' and '22' which was both in stock and how '22' is a much better number. Given that magnificent piece (hint: a tourby with a date function), personally both numbers are fine to me - small numbers.
Seven is also well-liked in other cultures, i.e. 'lucky seven' etc -- would I be correct to say ?
also, I know of at least a few collectors who seek out specific numbers they personally like, unassociated with any cultural leanings.
and ... I agree with Roberto - who can resist a small number ? I was presented with '9' and '98' - but opted for the '9'. I missed '3' 6 months ago - now that missed opportunity shot through me -- the third of 300 !
also - as has been commented in this forum before, not all of a limited edition are made all at the same time. I am not sure who chooses which numbers to be produced first, but I am sure if demand is high, all numbers will be produced and there will be someone, somewhere who will procure it.
off on a tangent, in Schaffhausen, I saw a few display pieces in the conference showroom numbered 000/XXX.