Dumbass, it takes a while for the KV's to actually get banned, you have to host an MW2 lobby for like 6 hours to gets banned. And even if it's banned, people still buy it, it's not hard to replace the KV.
Anyway, how much are you wanting for this?
And like the person above said, there are things that make it take longer for the ban to initialize. For jester to get banned, it takes like a week.