I have a set of Eibach springs that I ran on my 3rd gen for a little while. Only have about 1000 miles on them. They are in great shape. Asking $140 shipped to anywhere in the lower 48.
They are a 14" coil, 3" diamater, and the spring rate is 500 lbs/in. They are coil over coils and flat at both ends, so they will not work on the stock spring perch, or any other spring perch that is meant for coils with a pig tail end.
Coils pictured are coils being sold.