In addition to what was mentioned above (crank position sensor, leaky valve covers, drooping headliner...) I replaced my Throttle Body after experiencing bizarre and intermittent idle speeds and revving while driving.

My spoiler has been stuck in the down position for a couple of years. I didn't some brief troubleshooting but didn't come up with a fix.

I replaced the struts at about 80,000 miles that really buttoned the ride down.

I bought my 2004 low-VIN Crossfire new in 2003 and I still have people asking what it is - thinking it's some new exotic. It really does look new.