Depends on how you drop your car. Are you going to get just springs, or new spring/struts, or full coilovers? If you just get some eibch, h&r, or tein springs you can drop your car from anywhere of 140-260. If you go with a strut/spring combo prob around 400-700. Coilovers are going to be around 1k.

Go on maxima.org and read read read read about everything lol

Don't ask ppl on here for opinions. you should introduce yourself in the southeast section of maxima.org