I did some homework for you...
RCTECH has For Sale and Wanted to Buy forums. Go to the For Sale forum and search for Mi3. See how much others are asking for Mi3. Here is a link to a search I did (http://www.rctech.net/forum/search.p...rchid=16917995
Even though it is an older car there are a few classes where it can be raced competitively, such as VTA and USGT. Check out those threads in the on-road forums. Someone who is still racing that car in those classes might be willing to offer you more for your stuff.
Also, if there is a track near you that is running VTA or USGT, you might consider racing it yourself.