What I would tell someone (since you are a car guy, you already know what to look for, in general) only a few things to watch for:

1) Door rust - some cars have developed rust along the bottom of the door. YOu can search "Stop the rust while you can" here on the forum. I've owned three Roadsters and never had an issue with it, but some have.

2) On the SRTs, take a close look under the trunk liner for evidence of water in the low spots in back, the SRT fixed wing is a known problem for water leaking in and doing damage to electronics in the back of the car. (Someone else can remind me, is it just the coupes or also the roadsters???)