From Old Cars price Guide:
1969 Mustang Convertible
condition/ price
6/1300
5/3900
4/ 6500
3/ 14630
2/ 22750
1/ 32500
Note that condition 6 is basically a parts car, #5 is a complete vehicle but needs complete restoration of all systems and parts.#4 is a driver, #3 is very good, #1 as it was produced and in the condition at the end of the assembly line IF everyone did their job.
Most cars in car shows are #2 to #3. #1 is not driven as sand pits on the chrome or glass would drop it to a #2.

Oh. One interesting note on the price:" Add 30% for Cobra Jet v*. Add 40% for Super Cobra Jet."

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1982 300SD " Wotan" ..On the road as of Jan 8, 2007 with Historic Tags