i agree but there are products that you get what you pay for and some you just pay too much for, i have bought a shitload of parts for my wrx and some were well worth what i paid like the mrt intercooler in my opinion its worth the money its the biggest core available, along with aps, and is a well constucted kit with extremely nice piping but there are some that aren't worth the money like the up-pipe that i paid way to much for just to have the flex joint
but i definately agree with the turbo kits being too expensive but thats "jdm" for you but sam does have a good idea with his fab kit and seems to be well constructed