They can be used but but they need to work still. Looking to spend around $1000 maybe a little more depending on the deal. Wheels wont get here for a few months so I have some time.
https://www.rallysportdirect.com/shop/product/bcr-f-03-br-bc-racing-br-coilovers or https://www.rallysportdirect.com/sh...c-bc-racing-br-coilovers-w-rear-camber-plates are right around your price range. I had a set of the BR series coil overs on my old car and they were very nice.
or these D2's are nice as well, i also had a set of these and they road super smooth. http://www.autocityimports.com//0407-subaru-sti-d2-racing-coilovers-rs-series-p-19048.html
I've been looking at those and fortune autos if I go new. I had a line up on a used set of ohlins for $1200 but the guy told me they were 5x114 and they turned out to be 5x100. I'm not in a rush so I'm looking for a little bit of a nicer setup that's used. Last resort I'll probably get the bc or fortunes. I appreciate the reply though.
If you are still looking for Coilovers I have a set of Tein Monoflex coilovers on my 2005 STi. only thing is that I am looking to trade for stock STi struts and springs plus cash on your end. if you are interested shoot me a message! BTW my coilovers are practically new.