lowering springs

so i'm browsing ebay finding all kinds of cheap deals on springs which brings me to my question. Is a spring a spring? i mean are the 60 dollar ebay springs as functional as something u might buy from nopi or something.. mind you i'm not looking for great springs i just don't want my car to drag when i sit in it and a more aggressive look

thanks
Doug

theres a difference in the spring rates, cheaper usually means stiffer so unless you dont mind the bouncy ride there isnt much difference

i picked mine up for $65