260ZMELB

Hi, im new i just joined up. Would love some advice as i am thinking about lowering my 75 260z. At the moment it has stock suspension. I was on the technotoytuning website and they offer a bolt on set of adjustable coilovers. This way i get to save my original set and have these replace them. $3,405 AUD by the time it comes to my door. Can anyone think of a cheaper or better idea? Please help as i am just getting into the Z game. THANKYOU!