My CS cost £3500 10 years ago. In that time I have spent about £11000 on it including a new engine, gearbox repair, 2 clutches, 2 exhausts, new body panels, turbo, power steering pump, new suspension, brake master, new rads, and lots of other things.......
It is still in pieces at the moment and been off the road for 3 years now. Got to get it finished one of these days.......
I would be lucky to get my £3500 back on it, but in the future it will be like the TA/RA Celicas and should go up in value. I don't care how much I spent on it as I just like the car and don't intend to sell it.