Several reasons for purchasing parts domestically..

..You should receive your parts quicker.. problem is that Aus Post is really slow!... Im ordering stuff from China and USA and its getting here quicker than a parcel from Perth ( happened only today! 6 neon transformers from USA posted on Sat 21st March arrived today.... High temp food grade pump posted Perth 20th March also arrived today)

Combined costs + shipping should be cheaper... but if Marco and ilk have dropped their silly P+P costs then this is negated.

You are supporting your local industries... but if they are not supporting you then bugger them!

This isn't a dig at anyone.. just a basic listing of facts and if local vendors cant do at least 1 of the reasons above then why bother?