mayonaise

in the process of lowering my newly bought 5th gen, i brought my car to a shop to figure out how much the whole installation would be.. i know this shop well. i've been going there for a few years, and the owner does EXCELLENT work. whats more important is that i trust the owner's opinions. he said that he only buys GSR camber kits (not 100% sure thats the right brand name, but its close either way).. i believe him when i say i should not get some generic chinese or taiwanese made rip-offs, but the GSRs installed is going to add on about an extra $540, front and rear together

so what i'm asking is,
is this price normal for a camber kit? by searching for about five minutes on the web i found several camber kits that were A LOT cheaper.. eibach, for one. i saw ingalls camber kits come up a few times.. are they good??

i don't want to pay more than twice the cost of the springs, in addition to the springs. why are these things so damned expensive????????????