1, Non-stop rotating function needs magnet in globe and PCBA(with coil) in frame, and so it needs cost and a higher price.
2, Some supplier's so called rotation is by wind, or hand, will finally stop, but some suppler still intentionaly confuse rotation and non-stop rotation, to offer a deceptive lower price.
Generally speaking, rotation function is as follows,
1, All 3inches, or 85mm globe is not with non-stop self-rotating function.
2, All 106(about 4inches) or bigger globe, from us at least, are with non-stop rotating function, but not all on market.
So, please check this before you buy.