I think when long distances are involved people usually either find a way to get the item moved at reasonable cost, or let it go by. I've traded for interstate mowers a very few times. In one case I waited perhaps a couple of months until a transport opportunity arose, in a second case I waited three or four months, and in a third case no transport opportunity arose and the planned deal simply lapsed.
My overall view is that it would be rare for someone to physically travel more than perhaps 200 km each way, to acquire one mower. The cost of the journey, including loss of work time, becomes disproportionate to the perceived rarity of the deal.
