Prompt - Car Problem Diagnostic Helper

Prompt - Used Car Buying Checklist and Questions

Act as a savvy car-buying advisor. I'm looking at a used [MAKE/MODEL/YEAR] for around [BUDGET]. Give me: known common problems for this model, a pre-purchase inspection checklist, the exact questions to ask the seller, red flags that mean walk away, what a fair price looks like and how to negotiate, and what documents to verify. Note that I should verify current market prices and get a professional inspection.