I have one Sparco Torino with all brakets and sliders to put in your wrx. Used only a few months. Looks brand new. Non-Smoker. Its black and gray. New they cost 650.00 plus brakets (they go for $80-$100). Looking to get 450.00 for everything. Can install for you if needed.
I also have my stock passenger seat. Its in excellent condition. Looking to get 150.00, make offer.
Both came out of 02 wrx wagon, don't know if the brakets work for the sti.