What is my 1967 Convertible Mustang Worth ?

I bought my 1967 Convertible a couple of years ago from an estate.  The Vin# is 7F03C133497.  I don't have any history on what has been done to it.  It has a newer red paint job that I would say is average.  The interior is all white and in fairly good shape with no tears, it had been redone about 10 years ago as I found paperwork on it in the glovebox.  It is a 289 automatic and doesn't have any visible rust.  I found that it was orignaly sold in Iowa, and that is where I'm located.  It runs and drives fine.  Matching Door Code w/ 76B V 6F 15M 45 0 W,  Any idea of the value of it, or what a good sale price should be?  

NADA (www.nadaguides.com)states that low retail for a 67 vert is about $25K. Here is their definitions:
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".

Some of the vehicles in this publication could be considered "Daily Drivers" and are not valued as a classic vehicle. When determining a value for a daily driver, it is recommended that the subscriber use the low retail value.

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.