Help with a used suspension deal.

[TypeA]

BILSTEIN Sport Suspension KIT Front + Rear Struts Assembly.
Eibach lowering springs.

All for $450, donor car is a 2002 S 60k miles, exact milage on suspension unknown. I would love to lower my car an inch or two. However, I also love my 19" SSR GT3 rims. I have 10mm spacers on the rears. I can take some specific measurements if it helps answer the following questions:


1. Is it as good of a deal as it seems? Parts guy claims the Bilstein kit alone is $1200. He says no signs of leakage.

2. What can I do to verify that I can actually use the lowering springs? Parts guy claims hes not sure exactly but it looks like it lowered the donor car about 1" to 1 1/2".

3. How much can I expect my ride quality to suffer?

Any input, at all, would be helpful. I know nothing about suspensions. I dont track the car. Mainly city driving with occasional spirited back roads driving.