Eibach Pro-Street S Springs. Looking for price help.

[M1A....]

Hi. I've got a set of used Eibach Pro-Street S springs and tubes that came off my 08 GT500. The shock tubes leak and would need to be rebuilt. They are KW tubes. From what Eibach told me is that when these first came out, KW was making their shocks for them. I asked Eibach about a rebuild kit, and they don't have any for the KW's. They said I would need to contact KW. I just wound up picking up a new set. They are ride height adjustable. Spring rates are Front springs: 400 lb/in and Rear springs: 274 lb/in.

Before I put them up for sale, I'm looking for a little help as how I should price them fairly. Any help is appreciated.

Thanks in advance!!

From a Vendors website:

Eibach Pro-Street-S Coil-over kit. Provides excellent performance, along with adjustable ride height, for the 2007-10 Shelby Mustang GT500.

Benefits
• Ride height is fully adjustable.
• Front lowering range from 1.2" to 2.3"
• Rear lowering range from 1.4" to 2.1"
• Improved handling.
• Suitable for street and mild track use.
• Adjustable spring perches allow tuning corner-weights.
• 1-year warranty
Product Features
• Front springs: 400 lb/in
• Rear springs: 274 lb/in
• Monotube design for excellent performance and ride quality.
• Stainless steel construction provides excellent durability and superior corrosion protection.