I have upgraded my system and have the OEM 6-1/2" door speakers (2), dash tweeters (2), and the under-seat powered sub for sale. I removed everything within the first two weeks or so of receiving the car, so all is in excellent condition.
Asking $250 plus shipping from 28278.
From what I have read around here, the sub should be plug & play. I would imagine the tweeters are the same, but it may be wise to verify that first.