They are stage three being that they are compression adjustable rebound adjustable w lower knob and ride height adjustable. Knowing all that what's the shock length eye to eye. Then compress shock and slide off lower retaining ring removing all the springs. With springs off compress shock fully, if shock does not come back out to normal length and or acts slow. Then the shocks blown. Price ranges from 250-450$ depending on what length and what bike they are actually for and if they blow or not. Also on the top of shock where can is the bar coming across should be serial number to verify everything else.