I have a 280z and im adding a body kit which uses the 240z rounded turn signals in the front. I've been looking around and can barely find any. Most for sale are $200+. is that the case? why are they so expensive!? I am finding a few forums from 5+ years ago people selling them for $50 and so on. I would think aftermarket Repo's would be cheaper.

That’s going to be the market price you will find for new reproduction’s. Try Resurected Classic.’s. This time of year you might find a deal but you will probably stay in that range.