I have a set of STI Performance JDM Pink Springs for the BRZ for sale. These springs are designed to better match the stock shocks. They will lower the car by 15mm when compare to stock. You can translate the following Japanese links to get a description of their characteristics:
http://www.sti.jp/parts/catalogue/br...0330AS000.html
http://www.sti.jp/parts/catalogue/br...0380AS000.html
Had them for 19000km, no track driving just regular spirited/commute street driving. I've found that the car rotates a little better when cornering with them. They are in good condition and should have lots of life left. Only paint rub from contact with the perches on the stock shocks, otherwise very clean (I've already cleaned the dirt and grime off of them).
Bought from Japanparts. Paid 50,897yen (around $525CAD) for them shipped.
Asking $250CAD cash for them, that's like less than half of what you would pay for them new.
I'm located in Scarborough, locals only will not ship. Please PM me if interested.
Thanks for looking!