Sure Don, I'm here....
You might be thankful you leased. Steve is correct, the car is worth the same regardless of how you financed it.
Five-months-in there will be no real difference between a buy and a lease in terms of how much of your payments have gone to principle. I'm sure you've paid a little less in payments, but it's still immaterial.
The difference in most states is in how sales tax was calculated. On a PURCHASE, most states calculate tax based on your OWNERSHIP of an asset: ex. 6.5% sales tax on the purchase price, due on delivery. On a $70,000 RR that would be $4550. You owe $74550 when you leave. On a LEASE, most states calculate tax based on your USE of the car, based upon payment: ex. 6.5% of $900 payment is $58.50, due each month it is used. So you send in $958.50 including tax. You owe $70,000 when you leave.
So.... you might owe LESS on your leased vehicle 5 months in than you would on one you bought. In our example, you may owe $5000 less!
At this point, it works exactly the same as if you had a loan. Call the bank (lease company) and ask for today's payoff/ balance. Then figure out what it is truly worth, cash value, if you sell it yourself or if you sell it to the dealer. You need to cover the difference. It might hurt.
Honestly, you should get $61,000-$64000 or so from a dealer. You may be able to sell it on your own for $65,000. Most people in the market for a $65,000 car won't buy one they see parked in your lawn with a for sale sign.
I would get a few firm bids from dealers and sell it to the highest.
Leases are just financial instruments. They work very well for what they are intended for. In many cases they are 'better' than the alternatives.
'Buy' what appreciates, 'Rent' (or lease) what depreciates.
I'm sorry to hear that you are in a situation to find out just how hard that depreciation hits.
E