Hasbro offered DeSimone overstock of a few mail away figures which DeSimone then handpainted with store bought materials to create some exclusive figures. His first two endeavors were the Police Officer and Race Car Ace.
Race Car Ace is nothing more than a repainted 1983 Ace figure. He came with a handcrafted race car. The idea was definitely rooted in the exploits of the 12' Joe mythos when he became less military and more adventurer. The Ace figure isn't particularly noteworthy and modern customizers would cringe at the quality as you can see in the photo below.
The second figure was the Police Officer. This figure is noteworthy because DeSimone used overstock Starduster figures to make his customs. Seeing high quality Stardusters selling for over $100 in modern times makes it hard to fathom that there was once overstock of the figures. But, DeSimone got some and painted them up. The result, like the Ace, isn't stellar. But, it was something different for the time.
The most famous figure, though, is the convention Infiltrate Jinx. This figure is popular as DeSimone included it in his guidebooks. Jinx stepped up the production in that she included a card. Hasbro "sanctioned" the figure, for what that's worth. But, it is also known that if you were willing to pay market price, you could still have an "official" convention Jinx made by DeSimone himself after the conventions. Jinx has two variants, a blue Cobra logo or a black Cobra logo. The logo colors differentiated when you acquired the figure. Collectors don't seem to place any particular desirability of one color over the other any more, though.
Today, these figures are expensive. They can command a few hundred dollars. But, authentication is tough as anyone could make one with relative ease and there is no way to verify that any figure is the real deal or a later reproduction. So, buyer beware with these items. In the end, they are glorified customs. (As are all non Hasbro produced convention "exclusives".) So, you're paying a lot for something that's easily forged. The figures are part of Joe history. But, they are too sketchy for me to ever spend any money on.