Probably a number of contributing factors:-
1- 16.5 inch deck means it was more suited to smaller lawns - many people in this situation probably just went electric - like the Victa Qualcasts and regular Electric Victa's.
It's still a bit of a stuggle to sell 16.5 inch petrol mowers now - like the Masport 550 series mowers.

2- probably the regular (beer drinking) Aussie male, wanted to push a Victa 'Mustang' or 'Corvette' or 'Commodore' around the lawn on Sunday - not something with a big 'LIGHTWEIGHT' sticker on it. grin

Wasn't the sticker changed to 'Compact' in the last year or so of manufacture?

MF, its on my list as well - one of those things that is nice to have, but I don't intend to be paying exorbitant prices for (a 500 twin or Supreme is also on the list)