6k is to much, the milage is rather high, and mustangs in general are just so abundant that in my opinion/experiences the resale value is rather low, usually a bit below blue book.
Now for the required plug: Anyone wanna buy a yellow 2001 v6 convertible?
I know in my car i get a touch over 20 mpg highway if that's of any help.
You might want to wait until the 2005 mustang has been released, with a brand new body style comming out older body styles will likely flood onto the market at a cheaper price.
Of course take everything is say with a grain of salt.
So who wan'ts to buy my car? lol