INTV Corporation's Spiker! Super Pro Volleyball just sold on eBay for a remarkable $1,826.00 plus shipping and handling. This was one of the last cartridges released by INTV (along with Stadium Mud Buggies, known as Monster Truck Rally on the NES) circa late 1989 and is obviously extremely sought after by hardcore Intellivision collectors (though rarely reaching anywhere near what it just sold for, particularly unsealed). The limited releases of both Spiker! Super Pro Volleyball and Stadium Mud Buggies marked the end (1990) of the Intellivision's remarkable 10 year old original commercial run, even though Mattel had given up on the platform less than halfway through.
Check out the video below from "ed1269" to see how all those years of experience with the system paid off in the quality of the late-life games: