I'm guessing they got tired of it. It was obviously getting more difficult to source good stock at a price that made it worth while. The calibre of their stock meant you couldn't just buy 5-10 units per week. I'm sure they struggled last year. The guys are obviously perfectionists too, as the detail they put into prep was astounding.
Its a tough game as we know, so I hope they are moving to selling luxury yachts in Dubai or something.