Good or garbage?

[wolfsden]

Thinking of installing an air ride kit in my C-10. I see these being sold on eBay for $1100 anyone know if there any good?

1 - Set of Front Bag Mounts and Brackets
1 - Set of Rear Bag Mounts and Brackets
1 - Gauge Panel w/ Mounting Tab
4 - Slam Specialties SS-7 Air Bag Springs
4 - Air Lift Manual Paddle Valves
1 - Viair 40 Amp Relay
1 - Viair Pressure Switch
1 - Viair Air Tank 200 PSI
1 - Viair 444C CHROME Compressor
2 - Viair Dual Needle BLACK Face Pressure Gauges
1 - McGaughys Panhard Bar Adjustable
30 - Feet 1/4" Air Line
4 - 1/2" NPT to 1/4" PTC Bag Fittings
Hardware
Mounts & Bracket Specs:

Material: .188 CRS (Cold Rolled Steel)
Cutting: CNC Laser
Finish: Raw
Manufactured in the USA by Grunion Fabrication
Mounting Hardware: Included
Bag Specs:

Specialties SS-7
Diameter @ 0 PSI - 7"
Diameter @ Max PSI - 7"
Stroke - 9.3"
Max PSI - 250
Plate Material - Composite
Min Height - 2.7"
Max Height - 12"
Mounting Top - 2 @ 3/8" - 16
Mounting Btm - 3 @ 3/8" - 16
Air Port NPT - 1 @ 1/2"
Internal Bump Stops - Integrated
Force to Collapse - 50 lbs
Gauge Panel Specs:

304 Stainless Steel x .060" Thick
Height: 5.125"
Width: 5.25"
Mounting Flange Depth: 1.125" w/ 2 Holes
Manufactured by Grunion Fabrication in the USA
Gauge Specs:
Requires 1/8" Female NPT Compression Fitting for Installation (NOT INCLUDED)
2 - 1/8" Male NPT on Back Side
Amber Color Back Light
Dual Needle
Chrome Bezel
Pressure Measures - PSI and BAR
Face Diameter - 2.0625"
Paddle Valve Specs:

Switch / Valve allow you to control Airflow from Tank to Bags
Does not require Electrical hook up
Raise or Lower your truck in approximately 8 seconds
Side Push Tabs to snap in place
Complete FBSS Control
Air Line / Fitting Specs:

1/8" OD Air Line - Use 1/8" PTC x 1/8" Female NPT
1/4" OD Air Line - Use 1/4" PTC x 1/8" Female NPT