HAHA yes it is obviously its not a tank though. But it does drive with the tracks. I shouldn't have credit for this photo though as I found it on the internet a few years ago and its still one of my favourites. From what I remember it was at a smart owners club meet or something like that.
There's no specific time. But if you're planning to buy, do it before 31st Dec. Hardware prices in India are about to go terribly wrong from Jan 1, 12:00 AM (20~35% hike across everything, to adjust with USD-INR inflation).