"Craigslist Gems: Affordable 1960s Classic Cars for Sale by Owner Under $20K"

Each vehicle has its own unique characteristics, condition, and pricing. Here's a brief overview of each listing:

1. **1968 Mercury Cougar XR7 - $17,500 (South San Francisco)**
- Description: 6.2L 390 motor, matching number X CODE 4SPD, runs strong, clean inside and out. Contact number provided for inquiries.

2. **1962 Ford Thunderbird - $18,500 (Tucson, Arizona)**
- Description: 45,600 original miles, always garaged, black interior/exterior, well-maintained by second owner. Recent maintenance and rebuilt components mentioned.

3. **1966 Ford Mustang Coupe - $15,550 (Salem)**
- Description: C code coupe, original 289/2 barrel engine, C4 automatic transmission rebuilt recently. Various new parts and maintenance mentioned. Some interior and window issues noted.

4. **1967 Cadillac Coupe DeVille Convertible - $17,000 (Albuquerque)**
- Description: 429 V8, 3-speed TH-400 auto tranny, 61,350 miles, new top, rebuilt tranny, original wheels included. Described as running well.

5. **1967 Ford Mustang Convertible - $18,000 (Norco)**
- Description: Factory V8 C code convertible, currently not running after sitting for 10+ years. Contact number provided for inquiries.

6. **1965 Ford Mustang Coupe - $19,500 (Diamond Bar)**
- Description: Excellent condition, 6cyl automatic, recent replacements/upgrades, well-maintained family car, rarely driven, garaged.

7. **1966 289 Mustang - $19,500 (Carmichael)**
- Description: Fully restored, original 289 V8 motor, auto transmission, set up for daily driving, power steering, AC, 30,000 original miles, recent restoration, paint job, and interior redo.

These listings encompass a range of classic cars in different conditions, some needing work while others are described as in good running condition or restored. It's important to contact the sellers directly for further details, possibly schedule inspections, and negotiate the price based on the condition of the vehicle and your preferences.