Some modern slot machines still include a lever as a skeuomorphic design trait to trigger play. However, the mechanical operations of early machines have been superseded by random number generators, and most are now operated using buttons and touchscreens.
In most cases, we sell 'retired' machines to wholesalers who typically resell them to overseas gaming operators. Other times, we use the machines as a trade-in toward the purchase of new units. And in a few cases, we'll use the machine for spare parts for older models.