With its sales in the crapper, Tesla is resorting to a slate of deals and incentives to reinvigorate flagging customer interest in its lineup of electric vehicles. The company recently reported a 14 percent drop in second quarter sales year over year. Tesla’s sales in Europe have been in a serious slump with five straight consecutive months of decline. Moreover, all models except the Cybertruck are eligible for a free upgrade for a limited time. Meanwhile, Model Y buyers with “excellent credit” and a 15 percent down payment can get 3.49 percent APR financing, down from 5.54 percent.