Coilover SLEEVES Versus Real CoilOvers

[4jacks]

That's a junk load of money though, I'm just going to do this for the look, I'm not really into performance, I'd friggin kill myself, trying to test em out on the tight corners, and suspension ain't worth diddly on the track.

I think i'm going to go with a CoilOver Sleeve, for now with a 1" drop on stock suspension. I'm thinking 1" will be safe on the suspension, and I have to shell out some cash and get my driveway paved, before I go any lower.

From what I can tell Of the Coilover Sleeve set up, it really only consist on three components, A Spring, A Bolt, and A nut.
From what I can See, All three of these things are metal, and the spring will have a certain Spring constant ratio.
I can't really think of a reason why some set's of Sleeves would cost $500 and some on Ebay only cost $88

I emailed an $88 Dollar vendor on ebay, and thier response was that it came from the manufactor of the SKUNK2 coilovers, but was a no name brand.

Does anyone see a potential problem here, Am I overlooking something rather than spring constanst, and what grade of steel, is used ??!??!??!?