I will always combine shipping and make it as cost effective for you, let me know when you have finished purchasing and I will send an invoice with options.
Virtually all of the time I can fit many items into a 500g, 3kg or 5kg Express satchel, so combined shipping is only either $11, $15 or $25 for domestic.
International shipping is high for a lot of parts, this is because Australia Post do not offer a service under 250g, so up to 500g is the only option for parcels.
500g of International shipping will not cost more than $29, and 1kg will cost no more than $53. 2kg would be $71. All these are with tracking.
International letter shipping is available if items are under 20mm in thickness. (there are other size limits as well (260mm x 360mm)) This starts at $4.5 for 50g and goes to $19 for 500g, but there is no tracking with these services.
Items listed elsewhere.