I haven't seen it in a long time. Good indicator that its UP or that the Stuart, does the same and is more preferred since it doesn't lock you in a doctrine.
The M8 costs about the same, but is significantly less useful since the cannister nerf. It was always extremely vulnerable to PAK's and shreks so it was dangerous only for someone with really good micro. I would get one if it had better vision than a 222, or would lay mines, or anything useful but as they are, they're a waste of 40 fuel (in addition to the pop cap, muni's, etc).