Not sure how you intend to drive but you get what you pay for. In that I only buy used parts from EBAY the springs you showed are cheaper at jegs
Front Coil Springs
Also the steering kit is awful cheap, who makes the parts? I prefer Moog or similar Known brand, you can get Chinese made ball joints cheap but they are not that great. Metals are not as good " yes they pass the standard but the standard isn’t that high" and gain you get what you pay for. Also I like poly bushings to stiffen everything up a bit but nothing wrong with stock rubber.