Well - I would have to say someone just stuck that on there. None of Suzuki's trikes had a sticker like that. And actually - who ever put it on there must miss the concept of * X * - because it should read 2X3. You know - like a 4 wheel drive vehicle with 4 wheels = 4X4 - or a 2 wheel drive 4 wheeled vehicle is 2X4. For it to say 3 X 6 - that would insinuate that it is 3 wheel drive but has 6 wheels overall.
Anyway - as far as the Suzukis go - they are not much competition for anything. They have decent power for a 185cc 4 stroke - but they handle like a grand piano on 3 wheels.
As far as being rare - I would not necessarily buy into that either - there are lots of them still around. - However - I see you are in Hawaii - so I would say prolly just not as many there as here in the states - but isn't that the same for anything there?
RIP - Yamahondaman!! You will never be forgotten!
RIP - Sam Brehm!! Gone but NEVER forgotten!
RIP - Sandpuppi101 - You will live on in my mind - I miss you friend!