The models (spotted by Kotaku) appear to be based on G.I. Joe figures, and both Riley and Hesh come complete with all the expensive high-tech gear that the Ghosts somehow managed to easily acquire in the latest Call of Duty game.
The figures are being resold by user sigsauerp226r, who says the custom figurine "was not made by me, but I really can't afford to keep it." The auction was relisted after the original buyer backed out, and Infinity Ward has also highlighted the figures on its Twitter account.
For more information on Call of Duty: Ghosts, check out GameSpot's review.