Depends what you mean by "worth selling".
I still race mine and it is very competitive (I have won a number of club races with it) against modern machinnery. Parts and upgrades are still floating about and it is a really nice piece of kit and a good example of Yokomo top quality workmanship.
One really nice feature I found when I bought my TA05R is that it has the same body post configuration with the SSG so I can use both chassies at the track with the same bodyshells too! That alone makes it a keeper for me as I like to race as many of my cars as possible.
Not sure how much you can get for it if selling though.
Team Greasy Weasel
The best upgrade to any car is some driver skill.