mike_e said..
I would avoid the cheaper imported ones. I believe the bearings are not good quality and in some models the hubs aren't compatible with our standard Holden & ford setups. Trailer city @ rydalmere are good quality, well priced & good service. (I have no affiliation with them). Reasonable second hand ones come up on gumtree from time to time. Good luck.
Hi, if the cheaper ones are significantly cheaper then quality bearings are not expensive and easy to change and the addition of bearing buddies will make them last and last and last

. As to the holden/ford comment, have you looked at the selection of cars on the road today, and if the wheels are galvanised, who cares.