AutoNation is better than Carmax, but I used Craigslist

I sold my car recently.  Since it's not cheap,  I was thinking to make it easy by selling to a dealership.  AutoNation's offer is better than Carmax, but still under my expection.  I posted on Craigslist and sold to a private buyer within 2 days.   I only offered him to see my car as I talked with a few people on the phone and decided which person to meet.

My major concern is the payment method.  I don't want to take cash.   Before the buyer came to see my car,  we agreed on the payment method:

1/.  if he has cash on hand,  I'll go with him to a Walmart store so he can purchase a Money Order.  Or

2/.  if his bank is in my area,  I'll go with him to his bank so he can purchase a Cashier's Check. 

It turned out that me and the buyer both have account in the same bank. So he got the Cashier's Check and I deposited it right after.    FYI ,  we met at the parking lot of a grocery store.