No far west tax!
There seems to be a relatively simple "cheap" rule for "new" R18's if one isn't overly fussy (colour etc)..... that is: 2 year old "demo", normally less then 200km on them, most of them rego'd late half of their second year on the floor (so 4 and a bit years warranty at worst still left) then priced about 60-70% of retail on the eastern sea board..... this one was an outlier on bike sales last month (ie extra cheap).
The funny thing is some people will walk into an Indian dealer this year and pay $35k for what they could get for $20k or less in a BMW "clearance".
Adelaide is a bit like Perth.... one dealer and "tight" prices.... I normally buy new from the east and get it shipped back.... caravans/motor homes are the same.