I have a complete set of 04 STi struts, springs and top hats completely assembled and off my car. They have roughly 30k miles on them but have not started to clunk. I have kept them well lubricated without issue.
If you are willing to continue to maintain them through occasional sprays with Zep or other lubricant you should have no issues. If you don't, well, they may/may not start clunking on you. Perfect for someone who has coilovers and wants a cheap alternative for the winter.
I'm just looking to move these as they are taking up space in my apt. $300 OBO and they're yours. They will fit 02 - 05 WRX; 04 STi.
Note: I am clearly saying that they may start clunking on you which is why they are priced where they are. If you maintain them, you should be fine. I have been. If not, you accept any clunking that may start. I am not going to warranty these or place any sort of guarantee on them.