I would think it would depend on your local economy and the area population. If the economy is driven seasonally by tourism, then there might be an off peak market. In a manufaturing market , there might not. If there is heavy agricultural use, the typical tractor purchase might be a lot larger than if the area is used residentially and the typical tractor is used to landscape. Therefore, the smaller tractors might never come down in price or become any more numerous.
Steve