new ball joints

[rip]

how is it that places like so cal, kustom1, pacfic, and others can sell front trailing arms with new ball joints for only 20 bucks?

While other places sell ball joints for about 10-20 bucks. Plus to have them replaced in your own trailing arms your looking in the range of at least $100 worth of work.

I mean are the trailing arm/ball joints crap? Are they not checked, the real source and aircooled.net both sell similar items but are around $50.

Has any one bought these trailing arms from SoCal, Kustom1 or other for cheap, are they any good?

Thanks for the help.


*************NEVER MIND***************

the reason for the price difference is the core fees