I believe the cheapest are like 300 and the most expensive genuine leather ones maybe like 450 give or take. but I mean you're getting your own taste whatever colors/stitching u want, so you cant really beat it.
springs, a lot of companies are great, seems like whoever you ask theyll tell you whatever brand is on their own car is the best..Me personally I have Tein Htech. comfortable daily drivinig drop. personally my opinion is if you get like crazy low springs, it would get to uncomfortable, if you want LOW, get coils or save for air.
ive driven on my tein springs on the oem shocks for 2 years. I only live 5 miles aways from work so im only at 20k and the shocks wore out, very bump, so i just replaced the oem with the trd shock strut package. but the springs, im very happy with and love them. ill consider coilovers probably late in the summer.
but to save few bucks, you can just lurk the classifieds too, especially on scionlife. you could even post in the wanted section of the classifieds, i bet someone would respond with something. seems like more people have tanabe brand i thinhk so im sure theyre good too. but its still used, you dont know how or where the previous owner drove, if it were me i would only buy new suspension products. totally get what you mean certain mods have endless brands with similar products, i just went with brands i know, ive had tein suspension on a couple of project cars and daily drivers here and there so i figured might as well get em.
heres tein htech drop for reference. i nevered measured the drop, but some websites say 1.1 front 2.1 rear
this mine months ago. sold the carbonfiber and the rims since, gonna go with a new style.
hope that helps!