is the 35th anniversary worth more than just the 1...

$14,900 is a bit high for a 99,10,000 to 12,500 would be about right,their are so many on the road it is hard for a car lot to get that much out of one.

Yes, I would shoot for somewhere in between the high and low value depending on condition when selling it.  The 35th anniversary doesn't really do much for the value.  

The 35th anniversary Mustang really is just a trim package .
Chances are if you have a Bullit ,Shelby, or SVT you  would have something more collectable.
Ford , for some reason , doesn't do much special  when it comes to an anniversary edition . The 20th anniversary Gt350 did come with a special trim package , as well as rare options , such as Turbo convertible.
For the 25th , they had a special paint color ( forest green I think ) then the next year , they offered the green as a regular color .
Maybe a collector might offer more for an anniversary car , but , seeing the track record , don't bet on it being much more then a regular GT , especially being not very old yet ( give it another 15 years)

basically it was just a badge and rims...   ur not gona get any more for it than a regular GT mustang       i give them props though ... its just a little special edition...  it should be worth around 10k to 13k depending on mileage and condition...