I am not saying it is the most accurate gauge for comparison in the world, but since there is so little to choose from when trying to price out a car, I would reccomend that you plug the info in at NADA.com and see what they rate your car at then go from there. Because it is at least something that you can print out to show a potential buyer how you derived at the asking price and it is something they can inturn access to check your claims against, you are at least both talking about the same apple and he can't support a low ball counter offer.
Just as a most very basic reference when I plug your car in without listing any particular options it comes up as:
Original MSRP: $2,427
.............Low Retail Average Retail High Retail
Base Price $5,375 $12,150 $18,600
With a desription of values as follows:
Low Retail Value
This vehicle would be in mechanically functional condition, needing only minor reconditioning. The exterior paint, trim, and interior would show normal wear, needing only minor reconditioning. May also be a deteriorated restoration or a very poor amateur restoration. Most usable "as-is".
Note: This value does not represent a "parts car".
Average Retail Value
This vehicle would be in good condition overall. It could be an older restoration or a well-maintained original vehicle. Completely operable. The exterior paint, trim, and mechanics are presentable and serviceable inside and out. A "20-footer".
High Retail Value
This vehicle would be in excellent condition overall. It could be a completely restored or an extremely well maintained original vehicle showing very minimal wear. The exterior paint, trim, and mechanics are not in need of reconditioning. The interior would be in excellent condition. Note: This value does not represent a "100 Point" or "# 1" vehicle *.
* "100 Point" or "# 1" vehicle is not driven. It would generally be in a museum or transported in an enclosed trailer to concourse judging and car shows. This type of car would be stored in a climate-regulated facility.
Obviously the numbers will grow dramatically once you plug in your options.