I'm not from Perth but just flew back from there on Sunday. Had a friend's wedding at Matilda Bay, stayed with some mates in Trigg and then went on a road trip to Albany via Margaret River and Denmark. Good times!
I didn't see many 1ers in Perth but saw a LOAD of 135s in Sydney. In fact I don't think I saw any other variants in over a week there!
Syd is full of 135i's, Perth has mostly 120d/i's, and Melbourne I found was mostly 130/135/120s(130's being the rarest as always!)
'05 130i 6MT | BMWP BBK | M3 front LCA | M3 front tension arm | M3 rear wishbone | M3 rear upper guide links| Bilstein B14 PSS | Whiteline subframe inserts | P Zero Rosso
Australian 130i owners: https://facebook.com/groups/130iOwners