[CAMOETO]

Hard to tell with the pricing/leasing/incentive thread now gone, but this looks to be about a ~$37k MSRP car. The BMW CPO site list the price for purchase as $30,588.

These get 10-12% off MSRP brand new if you qualify for all current incentives, so you could conceivably get the same car brand new for ~$33.5k. This means that the discount for it being 1 year used and having 4k miles is only about $3k, and you loose about a year of warranty since it's not CPO. If purchasing this configuration, I would buy a new 2019 over this specific example.

Regarding the lease, once again it's hard to tell without having the latest lease numbers (money factor/residual/lease incentives), but I never get leases with down payments. It simply makes very little sense to do that as it provides no to very little discount overall to do a down payment on a lease, but the downsides are that your down payment is basically unrecoverable in case you get in a total loss during your lease and that money isn't available for your to invest.

If you add up the monthly payments and the amount due at signing and divide by 36 to come up with a real monthly payment, this lease will cost you ~$386/month + tax. This seems like a good deal, and probably cheaper than what leasing a non-demo would cost you, but then you have to remember that in reality this is a 1 year used car. If this configuration works for you, you could always try to haggle with them further and see if you can get a better deal for it since they are trying to push the 2018 demos out the door around this time of the year.